{ "schema_version": "chamgap-public-evidence-check-1.0", "public_id": "v3019-main", "verdict_number": "3019", "title": "Oral vitamin C × serum urate: a small average reduction differs from gout treatment", "view_version": "1.0", "view_created_date": "2026-10-22", "criteria_version": "1.0", "criteria_date": "2026-10-06", "review_date": null, "legacy_evidence_date": "2026-09-07", "review_scope": { "materials_read": "Existing review summaries and stored records of methodological application", "clinical_papers_directly_read": false, "new_clinical_search": false, "limitation": "Existing stored summary and preserved methodology application records. External papers, abstracts, registration, protocols, SAPs, original result tables and support disclosures are unread, and review of existing content remains incomplete.", "date_meaning": "This is the date the stored materials were checked, not the date of a new search of the clinical literature." }, "claim_context": { "population": "Adults without gout and healthy adults with high urate are distinguished from established gout. Details of baseline urate, deficiency, urate-lowering medication and group composition remain unverified.", "intervention": "Oral single-ingredient ascorbic acid tablets/capsules are distinguished from the 2026 C-added sugar-matched drink. Naturally occurring food C, combinations, intravenous use and hesperidin coadministration are not automatically included.", "dose": "Main-trial 500 mg/day and the 2026 single-agent drink’s nominal 600 mg and measured 592±12 mg are retained. The measured dispersion definition and actual exposure/adherence remain unverified.", "comparator": "Placebo and the sugar-matched drink are distinguished from active comparisons involving allopurinol initiation or titration. Strata defined by prior use are not relabeled as C and active-drug allocation arms.", "endpoint": "This concerns serum urate in mg/dL or mmol/L. A concentration change does not directly establish first-onset gout, attacks, recurrence, cure or replacement of standard medication. Units are not newly converted.", "duration": "2 months and 8 weeks are distinguished from the 2026 trial’s 2 weeks. Week 1 and week 2 visits, study periods and actual dosing/post-stopping follow-up are not combined as one duration.", "excluded_extensions": [ "Existing C54, caution, B/S/R0/I2/E+/B2/C0, disabled indicators and empty values are preserved. Historical independent-comparison wording and pooled signals do not establish completed clinical content review in this work.", "The existing −0.59 mg/dL is a calculated simple change difference without its own 95% CI. CIs for each group’s change are not used as a between-group CI, and no new difference or interval is calculated.", "The 20 existing allopurinol users and 20 nonusers define strata for allocation within each stratum. They are not relabeled as 20 in the C arm and 20 in the active-drug arm.", "The 2026 single-agent C drink’s within-group week 1 P<.01 and absence of detected time-specific between-group differences are retained together. Model mean±SE is not relabeled as SD or CI, and the design is not relabeled as every participant receiving all four drinks.", "The review’s average −0.35 mg/dL across 13 RCTs and substantial heterogeneity are retained without adding primary-trial and review participants. Serum urate is not extended into proof of preventing or curing gout or replacing standard treatment.", "Existing caution concerning gastrointestinal effects of high oral doses and stone risk, kidney disease and iron overload is retained. Unverified report-specific harm collection, denominators and long-term details do not establish absence of harm or individual dosing instructions." ] }, "requirements": [ { "item_id": "N01", "question_type": "Evidence condition", "question": "Which urate question is addressed?", "needed": "Direct comparison of oral single-ingredient C and serum urate in adults", "role": "Required", "role_reason": "Material on Direct comparison of oral single-ingredient C and serum urate in adults is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Direct comparison of oral single-ingredient C and serum urate in adults must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original population, comparator and blood-test endpoint/time tables are needed. Gout prevention, cure or replacement of standard medication is not added. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The outcome is reduced serum urate in adults. Serum urate in mg/dL or mmol/L and gout attacks, first onset or recurrence are different questions.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original population, comparator and blood-test endpoint/time tables are needed. Gout prevention, cure or replacement of standard medication is not added.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original population, comparator and blood-test endpoint/time tables are needed. Gout prevention, cure or replacement of standard medication is not added." }, { "item_id": "N02", "question_type": "Evidence condition", "question": "Are tablets/capsules and C-added drinks distinguished?", "needed": "Products/ingredients of ascorbic acid tablets/capsules and sugar-matched added-C drinks", "role": "Required", "role_reason": "Material on Products/ingredients of ascorbic acid tablets/capsules and sugar-matched added-C drinks is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Products/ingredients of ascorbic acid tablets/capsules and sugar-matched added-C drinks must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original product, salt, added ingredients/sugars, manufacturing, excipients and single-agent conditions are needed. Formulation equivalence is not certified. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The formulation distinguishes tablets/capsules from the 2026 sugar-matched C-added drink. Naturally occurring food C, combinations and IV use are not automatically included.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original product, salt, added ingredients/sugars, manufacturing, excipients and single-agent conditions are needed. Formulation equivalence is not certified.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original product, salt, added ingredients/sugars, manufacturing, excipients and single-agent conditions are needed. Formulation equivalence is not certified." }, { "item_id": "N03", "question_type": "Evidence condition", "question": "Are 500 mg and nominal 600/measured 592±12 mg retained?", "needed": "Trial-specific dose, measured content, frequency and exposure", "role": "Required", "role_reason": "Material on Trial-specific dose, measured content, frequency and exposure is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Trial-specific dose, measured content, frequency and exposure must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original measurement, dispersion definition, ingredients, administration/adherence and trial-specific dose linkage are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "Doses are main-trial 500 mg/day and the 2026 single-agent drink’s nominal 600 mg (measured 592±12 mg). Original units/± are retained without deriving conversions or recommendations.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original measurement, dispersion definition, ingredients, administration/adherence and trial-specific dose linkage are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original measurement, dispersion definition, ingredients, administration/adherence and trial-specific dose linkage are needed." }, { "item_id": "N04", "question_type": "Evidence condition", "question": "Are 2 months, 8 weeks and 2 weeks retained separately?", "needed": "Original-trial exposure, measurement and follow-up end points", "role": "Required", "role_reason": "Material on Original-trial exposure, measurement and follow-up end points is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Original-trial exposure, measurement and follow-up end points must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Each report’s original schedule, actual dosing, post-stopping course and period/time linkage are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The duration distinguishes 2 months and 8 weeks from the 2026 trial’s 2 weeks. R01 bibliography records 184 participants over 2 months. Results are not relabeled as one duration.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Each report’s original schedule, actual dosing, post-stopping course and period/time linkage are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Each report’s original schedule, actual dosing, post-stopping course and period/time linkage are needed." }, { "item_id": "N05", "question_type": "Evidence condition", "question": "Are non-gout, healthy high-urate and established-gout populations distinguished?", "needed": "Population-specific baseline urate, diagnosis, deficiency and urate medication", "role": "Required", "role_reason": "Material on Population-specific baseline urate, diagnosis, deficiency and urate medication is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Population-specific baseline urate, diagnosis, deficiency and urate medication must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original diagnosis, baseline tests, medication/deficiency, eligibility/exclusions and group tables are needed. A pooled mean is not used as every population’s value. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The population separates adults without gout or healthy high-urate adults from established gout. The existing counterview retains differences in baseline urate, deficiency, medication and applicability to gout.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original diagnosis, baseline tests, medication/deficiency, eligibility/exclusions and group tables are needed. A pooled mean is not used as every population’s value.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original diagnosis, baseline tests, medication/deficiency, eligibility/exclusions and group tables are needed. A pooled mean is not used as every population’s value." }, { "item_id": "N06", "question_type": "Evidence condition", "question": "Are placebo, drinks and allopurinol retained as different contrasts?", "needed": "R01 placebo, R02 active-drug and R03 sugar-matched drink conditions", "role": "Required", "role_reason": "Material on R01 placebo, R02 active-drug and R03 sugar-matched drink conditions is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on R01 placebo, R02 active-drug and R03 sugar-matched drink conditions must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original report/stratum-specific group conditions, drug initiation/titration, matched drinks and common care are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The comparator separates placebo/sugar-matched drinks from direct allopurinol initiation or titration comparisons. An active-drug contrast is not relabeled as a placebo test of 0 effect.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original report/stratum-specific group conditions, drug initiation/titration, matched drinks and common care are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original report/stratum-specific group conditions, drug initiation/titration, matched drinks and common care are needed." }, { "item_id": "N07", "question_type": "Evidence condition", "question": "Can diet, urate medication, coadministration and adherence be separated?", "needed": "Baseline medication, treatment changes, diet/drinks and actual exposure", "role": "Required", "role_reason": "Material on Baseline medication, treatment changes, diet/drinks and actual exposure is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Baseline medication, treatment changes, diet/drinks and actual exposure must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original maintained/changed medication, diet, common care, adherence and discontinuation records are needed. An isolated C effect is not established. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The account retains applicability differences involving baseline urate medication, deficiency and sugary drinks. Detailed actual group-specific diet, medication and adherence remain unverified here.", "condition_status": "Unverified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original maintained/changed medication, diet, common care, adherence and discontinuation records are needed. An isolated C effect is not established.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original maintained/changed medication, diet, common care, adherence and discontinuation records are needed. An isolated C effect is not established." }, { "item_id": "N08", "question_type": "Evidence condition", "question": "What are the R01 sample of 184 and group analysis denominators?", "needed": "Huang trial allocation, analysis, completion and urate denominators", "role": "Required", "role_reason": "Material on Huang trial allocation, analysis, completion and urate denominators is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Huang trial allocation, analysis, completion and urate denominators must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original group flow, analysis/completion, missing endpoints and exclusion/missingness rules are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R01 records 184 participants; group allocation and final analysis sample sizes remain unverified. Group counts, completers and attrition are not newly created.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original group flow, analysis/completion, missing endpoints and exclusion/missingness rules are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original group flow, analysis/completion, missing endpoints and exclusion/missingness rules are needed." }, { "item_id": "N09", "question_type": "Evidence condition", "question": "What are R01 group-specific changes and CIs?", "needed": "Separate C/placebo change intervals and the between-group test", "role": "Required", "role_reason": "Material on Separate C/placebo change intervals and the between-group test is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Separate C/placebo change intervals and the between-group test must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original change/variance, groups/time points, denominators and adjustment/test tables are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The original result is C change −0.5 mg/dL (95% CI −0.6, −0.3), placebo +0.09 (−0.05, 0.2), between-group P<.0001. Group-change CIs are not transferred into a between-group difference CI.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original change/variance, groups/time points, denominators and adjustment/test tables are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original change/variance, groups/time points, denominators and adjustment/test tables are needed." }, { "item_id": "N10", "question_type": "Evidence condition", "question": "Is the existing −0.59 calculation distinguished from its missing CI?", "needed": "Historical simple change difference and original between-group estimate/CI", "role": "Required", "role_reason": "Material on Historical simple change difference and original between-group estimate/CI is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Historical simple change difference and original between-group estimate/CI must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original between-group estimates, variance, CIs and model are needed. Group-specific CIs are not reused or reverse-calculated. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The stored change difference −0.59 mg/dL is a calculation without its own 95% CI. It is not a new calculation or certification of an adjusted/precise effect in this work.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original between-group estimates, variance, CIs and model are needed. Group-specific CIs are not reused or reverse-calculated.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original between-group estimates, variance, CIs and model are needed. Group-specific CIs are not reused or reverse-calculated." }, { "item_id": "N11", "question_type": "Evidence condition", "question": "Are R01 allocation, blinding and prior urate hierarchy known?", "needed": "Sequence, concealment, blinding, registration/SAP and primary endpoint", "role": "Required", "role_reason": "Material on Sequence, concealment, blinding, registration/SAP and primary endpoint is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Sequence, concealment, blinding, registration/SAP and primary endpoint must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original methods, registration, plans and all endpoints/time points are needed. No formal RoB2/GRADE is produced. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R01 is a double-blind placebo RCT, but prior registration/SAP remain unverified. A design label does not certify every method or prespecification.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original methods, registration, plans and all endpoints/time points are needed. No formal RoB2/GRADE is produced.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original methods, registration, plans and all endpoints/time points are needed. No formal RoB2/GRADE is produced." }, { "item_id": "N12", "question_type": "Evidence condition", "question": "Are the two R02 allopurinol strata kept distinct from treatment arms?", "needed": "Allocation/denominators within strata of 20 prior users and 20 nonusers", "role": "Required", "role_reason": "Material on Allocation/denominators within strata of 20 prior users and 20 nonusers is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Allocation/denominators within strata of 20 prior users and 20 nonusers must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Stratum-specific drug initiation/titration, group allocation/analysis, baseline urate and flow tables are needed. Participants are not summed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R02 records 40 participants: 20 existing allopurinol users and 20 nonusers, with allocation within each stratum. These 20/20 are not relabeled as C-arm/active-control counts.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Stratum-specific drug initiation/titration, group allocation/analysis, baseline urate and flow tables are needed. Participants are not summed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Stratum-specific drug initiation/titration, group allocation/analysis, baseline urate and flow tables are needed. Participants are not summed." }, { "item_id": "N13", "question_type": "Evidence condition", "question": "What are the urate reductions in the R02 active comparison?", "needed": "Contrast, P value and adjusted CI for reductions of 0.23 versus 1.9 mg/dL", "role": "Required", "role_reason": "Material on Contrast, P value and adjusted CI for reductions of 0.23 versus 1.9 mg/dL is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Contrast, P value and adjusted CI for reductions of 0.23 versus 1.9 mg/dL must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original stratum/group, variance, model, CI and time/denominator result tables are needed. No new difference, 0 effect or flare-prevention estimate is created. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R02 records reductions of 0.23 versus 1.9 mg/dL, P<.001, with the exact adjusted between-group CI unverified. The comparison shows a smaller response than allopurinol, not no C effect versus placebo.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original stratum/group, variance, model, CI and time/denominator result tables are needed. No new difference, 0 effect or flare-prevention estimate is created.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original stratum/group, variance, model, CI and time/denominator result tables are needed. No new difference, 0 effect or flare-prevention estimate is created." }, { "item_id": "N14", "question_type": "Evidence condition", "question": "Are the R02 open-label design and registration citation distinct from actual plans?", "needed": "Open-label pilot methods and official ACTRN history", "role": "Required", "role_reason": "Material on Open-label pilot methods and official ACTRN history is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Open-label pilot methods and official ACTRN history must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original methods, within-stratum allocation, registration/changes and protocol/SAP are needed. A registration identifier does not establish prespecification or reading. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The design is an open-label randomized pilot with an active comparison. ACTRN12610000545066 is reported in the paper; official registration details remain unverified.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original methods, within-stratum allocation, registration/changes and protocol/SAP are needed. A registration identifier does not establish prespecification or reading.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original methods, within-stratum allocation, registration/changes and protocol/SAP are needed. A registration identifier does not establish prespecification or reading." }, { "item_id": "N15", "question_type": "Evidence condition", "question": "Is the 2026 two-period/group design preserved?", "needed": "HesperidrinC groups/periods, drinks and crossover/allocation conditions", "role": "Required", "role_reason": "Material on HesperidrinC groups/periods, drinks and crossover/allocation conditions is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on HesperidrinC groups/periods, drinks and crossover/allocation conditions must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original allocation/sequence, periods, drink conditions, washout, assessments/denominators and plans are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R03 uses randomized drink comparisons with two study groups and two periods; not everyone received all four drinks. It is not relabeled as a universal 4-drink crossover.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original allocation/sequence, periods, drink conditions, washout, assessments/denominators and plans are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original allocation/sequence, periods, drink conditions, washout, assessments/denominators and plans are needed." }, { "item_id": "N16", "question_type": "Evidence condition", "question": "Are 43 assigned, 40 analysed and 20 each for C/control distinguished?", "needed": "R03 allocation, analysis and single-agent drink contrast denominators", "role": "Required", "role_reason": "Material on R03 allocation, analysis and single-agent drink contrast denominators is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on R03 allocation, analysis and single-agent drink contrast denominators must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original group/period flow, endpoint denominators, missingness/exclusions and same-participant linkage are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R03 records 43 assigned→40 analysed; 20 each for C and control drinks. Additional combination drinks, periods or people are not added and attrition is not calculated.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original group/period flow, endpoint denominators, missingness/exclusions and same-participant linkage are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original group/period flow, endpoint denominators, missingness/exclusions and same-participant linkage are needed." }, { "item_id": "N17", "question_type": "Evidence condition", "question": "Are time-specific R03 model mean±SE values preserved?", "needed": "C/control baseline, week 1 and week 2 model means/SE", "role": "Required", "role_reason": "Material on C/control baseline, week 1 and week 2 model means/SE is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on C/control baseline, week 1 and week 2 model means/SE must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original units, model, adjustment, time/group, denominators and all contrasts are needed. SE is not relabeled as SD/CI and differences are not calculated. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R03 records C 6.02±.20→5.54±.20 (week 1)→5.71±.20 (week 2); control 5.86±.20→5.76±.20→5.86±.20, as model mean±SE.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original units, model, adjustment, time/group, denominators and all contrasts are needed. SE is not relabeled as SD/CI and differences are not calculated.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original units, model, adjustment, time/group, denominators and all contrasts are needed. SE is not relabeled as SD/CI and differences are not calculated." }, { "item_id": "N18", "question_type": "Evidence condition", "question": "Are within-C P values distinguished from undetected between-drink differences?", "needed": "Within-group week 1 test and time-specific control contrasts", "role": "Required", "role_reason": "Material on Within-group week 1 test and time-specific control contrasts is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Within-group week 1 test and time-specific control contrasts must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original between-group estimates/CIs, multiplicity, model and all time points are needed. Within-group significance is not converted into a placebo effect, equivalence or precise null effect. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R03 retains within-C week 1 P<.01 alongside no detected time-specific between-group difference in the original account. It is not counted as positive between-group replication equivalent to the early RCT.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original between-group estimates/CIs, multiplicity, model and all time points are needed. Within-group significance is not converted into a placebo effect, equivalence or precise null effect.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original between-group estimates/CIs, multiplicity, model and all time points are needed. Within-group significance is not converted into a placebo effect, equivalence or precise null effect." }, { "item_id": "N19", "question_type": "Evidence condition", "question": "Are C+hesperidin and observational diet excluded from single-agent effects?", "needed": "Original contrasts for single-agent drinks versus combinations/natural diet", "role": "Required", "role_reason": "Material on Original contrasts for single-agent drinks versus combinations/natural diet is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Original contrasts for single-agent drinks versus combinations/natural diet must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original drink ingredients, allocation/periods, single-agent contrasts and distinction from combination/observational material are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The existing explanation excludes C+hesperidin and observational diet from single-agent confirmation. A combination in the paper title is not copied into an isolated effect.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original drink ingredients, allocation/periods, single-agent contrasts and distinction from combination/observational material are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original drink ingredients, allocation/periods, single-agent contrasts and distinction from combination/observational material are needed." }, { "item_id": "N20", "question_type": "Evidence condition", "question": "Are R03 official registration hierarchy and the paper-reported number distinguished?", "needed": "Official NCT04316390 change history and primary endpoints/time points", "role": "Required", "role_reason": "Material on Official NCT04316390 change history and primary endpoints/time points is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Official NCT04316390 change history and primary endpoints/time points must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original registration, changes, plans and analysis tables are needed. Current registration reading, compliance or prespecification is not certified. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The registration/citation record retains the paper-reported NCT04316390 identifier, while official history, primary hierarchy and time-point correspondence remain unverified.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original registration, changes, plans and analysis tables are needed. Current registration reading, compliance or prespecification is not certified.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original registration, changes, plans and analysis tables are needed. Current registration reading, compliance or prespecification is not certified." }, { "item_id": "N21", "question_type": "Evidence condition", "question": "Is the pooled report of 13 RCTs kept distinct from a new primary trial?", "needed": "Juraschek review included/shared trials, extraction and heterogeneity", "role": "Required", "role_reason": "Material on Juraschek review included/shared trials, extraction and heterogeneity is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Juraschek review included/shared trials, extraction and heterogeneity must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original inclusion/extraction tables, model, CIs, denominators and shared-trial/report links are needed. Review and primary-trial participants are not summed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "Bibliography-only R04 retains an average −0.35 mg/dL across 13 RCTs with substantial heterogeneity. Included-trial counts come from the original summary and are not new certification of unique trials or independent replication.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original inclusion/extraction tables, model, CIs, denominators and shared-trial/report links are needed. Review and primary-trial participants are not summed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original inclusion/extraction tables, model, CIs, denominators and shared-trial/report links are needed. Review and primary-trial participants are not summed." }, { "item_id": "N22", "question_type": "Evidence condition", "question": "Are differences by disease, baseline status and medication retained?", "needed": "Directness for gout/non-gout, high urate, deficiency and medication", "role": "Required", "role_reason": "Material on Directness for gout/non-gout, high urate, deficiency and medication is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Directness for gout/non-gout, high urate, deficiency and medication must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original disease/baseline, formulation, duration, medication-specific effects/denominators and prespecified subgroups/interactions are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The original rationale retains mixed gout/high-urate results, while the counterview retains baseline and medication applicability limits. Findings are not simply merged as identical replication of one question.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original disease/baseline, formulation, duration, medication-specific effects/denominators and prespecified subgroups/interactions are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original disease/baseline, formulation, duration, medication-specific effects/denominators and prespecified subgroups/interactions are needed." }, { "item_id": "N23", "question_type": "Evidence condition", "question": "Are urate units, measurement and analysis sets distinguished?", "needed": "mg/dL, mmol/L, baseline/change values and measurement/adjustment", "role": "Required", "role_reason": "Material on mg/dL, mmol/L, baseline/change values and measurement/adjustment is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on mg/dL, mmol/L, baseline/change values and measurement/adjustment must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original assay, units, blood sampling/time points, baseline adjustment, variance and estimand are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The primary endpoint is serum urate in mg/dL or mmol/L. Original units are not converted and serum concentrations are not relabeled as flare outcomes.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original assay, units, blood sampling/time points, baseline adjustment, variance and estimand are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original assay, units, blood sampling/time points, baseline adjustment, variance and estimand are needed." }, { "item_id": "N24", "question_type": "Evidence condition", "question": "What is the original impact of missingness, attrition and selective reporting?", "needed": "Group/stratum/period missingness, discontinuation, denominators and handling", "role": "Required", "role_reason": "Material on Group/stratum/period missingness, discontinuation, denominators and handling is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Group/stratum/period missingness, discontinuation, denominators and handling must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Flow, attrition/exclusions, missing-data handling, all planned time points and sensitivity material are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R01 unverified final group sample sizes, R02 within-stratum allocation and R03 allocation/analysis records are distinguished. Detailed missingness/exclusion rules remain unverified here.", "condition_status": "Unverified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Flow, attrition/exclusions, missing-data handling, all planned time points and sensitivity material are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Flow, attrition/exclusions, missing-data handling, all planned time points and sensitivity material are needed." }, { "item_id": "N25", "question_type": "Evidence condition", "question": "Are first-onset gout, recurrence, cure and drug replacement kept separate?", "needed": "Direct comparison of serum urate and clinical gout events", "role": "Supplementary", "role_reason": "Material on Direct comparison of serum urate and clinical gout events is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Direct comparison of serum urate and clinical gout events must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Direct tests of attacks, first onset, recurrence or drug replacement are separately needed. Other verdicts/research are not newly accessed here. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The existing explanation treats clinical gout as a separate question. Urate reduction or active-drug comparisons are not proof of first onset, recurrence, cure or drug replacement.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Direct tests of attacks, first onset, recurrence or drug replacement are separately needed. Other verdicts/research are not newly accessed here.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Direct tests of attacks, first onset, recurrence or drug replacement are separately needed. Other verdicts/research are not newly accessed here." }, { "item_id": "N26", "question_type": "Evidence condition", "question": "Are four company-involvement pathways and the three trials retained separately?", "needed": "Funding, in-kind/product support, employee authors and COI", "role": "Required", "role_reason": "Material on Funding, in-kind/product support, employee authors and COI is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Funding, in-kind/product support, employee authors and COI must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original funding, in-kind/products, affiliations, COI and report-specific linkage are needed. Overall I2 and specific R03 I1 records are not replaced or rescored. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "R01 funding/manufacturer involvement is unverified; R02 records HRC New Zealand support with product/employee details unverified; R03 retains no external grant plus Döhler/Eckes-Granini/Ferrer in-kind support/I1. No grant is not relabeled as no company involvement.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original funding, in-kind/products, affiliations, COI and report-specific linkage are needed. Overall I2 and specific R03 I1 records are not replaced or rescored.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original funding, in-kind/products, affiliations, COI and report-specific linkage are needed. Overall I2 and specific R03 I1 records are not replaced or rescored." }, { "item_id": "N27", "question_type": "Evidence condition", "question": "Are 4 reports distinguished from unique trials and participants?", "needed": "Research families/shared samples of three original trials/comparisons and a review", "role": "Required", "role_reason": "Material on Research families/shared samples of three original trials/comparisons and a review is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Research families/shared samples of three original trials/comparisons and a review must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Registration, institutions/timing, teams, products and included/additional-report/same-sample links are needed. Final totals are null. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The 3 trial summaries and 4 citations represent primary-material/review units. Original I2/R0 records are retained; independent replication or final unique trial/participant totals are not certified here.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Registration, institutions/timing, teams, products and included/additional-report/same-sample links are needed. Final totals are null.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Registration, institutions/timing, teams, products and included/additional-report/same-sample links are needed. Final totals are null." }, { "item_id": "N28", "question_type": "Evidence condition", "question": "Are harm collection, events and discontinuation known?", "needed": "Definition, collection and events/discontinuation for diarrhoea/gastrointestinal harms", "role": "Supplementary", "role_reason": "Material on Definition, collection and events/discontinuation for diarrhoea/gastrointestinal harms is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Definition, collection and events/discontinuation for diarrhoea/gastrointestinal harms must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Original harm methods, severity, events/discontinuation, missingness and comparator records are needed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The original safety account retains high-dose gastrointestinal caution and limited event counts. Actual events, collection and causality are not newly established.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Original harm methods, severity, events/discontinuation, missingness and comparator records are needed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Original harm methods, severity, events/discontinuation, missingness and comparator records are needed." }, { "item_id": "N29", "question_type": "Evidence condition", "question": "What are the safety denominators, exposure and comparators?", "needed": "Group/stratum/period actual treatment, safety sets and exposure/events", "role": "Supplementary", "role_reason": "Material on Group/stratum/period actual treatment, safety sets and exposure/events is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Group/stratum/period actual treatment, safety sets and exposure/events must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Group-specific safety denominators, exposure/discontinuation, events and comparator/stratum/period linkage are needed. Incidence and totals are not calculated. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The 184, 40 and 43 assigned/40 analysed do not certify safety denominators. Different periods, medication or drinks are not combined as identical harm exposure.", "condition_status": "Unverified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Group-specific safety denominators, exposure/discontinuation, events and comparator/stratum/period linkage are needed. Incidence and totals are not calculated.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Group-specific safety denominators, exposure/discontinuation, events and comparator/stratum/period linkage are needed. Incidence and totals are not calculated." }, { "item_id": "N30", "question_type": "Evidence condition", "question": "What is known about kidney disease, stones, iron overload, coadministration and long-term harms?", "needed": "Vulnerable groups, alternative causes/medication and rare/long-term/independent harms", "role": "Supplementary", "role_reason": "Material on Vulnerable groups, alternative causes/medication and rare/long-term/independent harms is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Vulnerable groups, alternative causes/medication and rare/long-term/independent harms must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: Vulnerable populations, coadministration, event timing/alternative causes, independent reports, longer exposure and denominators are needed. No new harm search or judgment is performed. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "The product account’s caution for stone predisposition, kidney disease and iron overload is retained. Urate results are not converted into certification of kidney/stone or long-term safety.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "Vulnerable populations, coadministration, event timing/alternative causes, independent reports, longer exposure and denominators are needed. No new harm search or judgment is performed.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "Vulnerable populations, coadministration, event timing/alternative causes, independent reports, longer exposure and denominators are needed. No new harm search or judgment is performed." }, { "item_id": "N31", "question_type": "Evidence condition", "question": "Are historical HTML/PDF/abstract checks distinguished from current unread material?", "needed": "Original access record, stored summary and external abstracts/full text/registration/plans", "role": "Required", "role_reason": "Material on Original access record, stored summary and external abstracts/full text/registration/plans is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Original access record, stored summary and external abstracts/full text/registration/plans must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: External material remains unread now. A past cache failure is not converted into current paper inaccessibility, and past checks are not promoted into newly completed QA. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "Citations retain historical abstract/institutional bibliography checks and 2026 HTML/tables/methods/PDF-text checks with a PDF-screenshot cache failure. These are historical records, not current external reading or access testing.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "External material remains unread now. A past cache failure is not converted into current paper inaccessibility, and past checks are not promoted into newly completed QA.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "External material remains unread now. A past cache failure is not converted into current paper inaccessibility, and past checks are not promoted into newly completed QA." }, { "item_id": "N32", "question_type": "Evidence condition", "question": "Are Korean/English text, empty corrections and prior calculation records preserved?", "needed": "Complete originals, empty correction/subclaim records and prior calculation", "role": "Supplementary", "role_reason": "Material on Complete originals, empty correction/subclaim records and prior calculation is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Complete originals, empty correction/subclaim records and prior calculation must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: After content review, new material, corrections or verdict changes are recorded as separate events. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "Korean/English text, empty correction/subclaim arrays and the original −0.59 calculation label are retained. No new calculation, correction or completed English clinical review is created.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "After content review, new material, corrections or verdict changes are recorded as separate events.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "After content review, new material, corrections or verdict changes are recorded as separate events." }, { "item_id": "N33", "question_type": "Evidence condition", "question": "Are original C54, axes and evidence date distinct from production?", "needed": "Original C54, caution, assessment axes and evidence date", "role": "Required", "role_reason": "Material on Original C54, caution, assessment axes and evidence date is needed to connect oral single-ingredient treatment, populations, comparators, urate measurement, time points, strata, denominators, precision and harms.", "application_exception": "Existing C54, caution, assessment axes and empty values are retained. Urate concentrations and gout attacks, placebo, active drug and drinks, within- and between-group findings, strata, periods and denominators are distinguished. No new change differences, CIs, unit conversions, attrition, incidence, unique totals or dosing guidance are created.", "criterion": "Original records on Original C54, caution, assessment axes and evidence date must link to the same product, population, comparator, test, time point, stratum and denominator, distinguishing within-group and between-group findings, placebo and active drug, and direct trials and pooled reviews.", "basis": "Existing principles distinguish questions, direct comparisons, reports and trials, endpoints, denominators, precision and harms.", "condition_origin": "These evidence conditions concern the existing question of oral single-ingredient vitamin C and serum urate in adults. They do not establish new preregistration, official assessment or independent clinical validation.", "proposed_research": "Material needed: New material, condition revisions and verdict changes are separate events after content review. The original date is not used as a current search or external reading date. This records needed materials; no new research was executed.", "current_reports": [ "R01", "R02", "R03", "R04" ], "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing Korean and English review summary, question and citations read; external abstracts, full text, registration, protocols and analysis plans unread", "observation": "C/54/caution, original assessment axes and the existing evidence date 2026-09-07 are retained. Original independence/pooled-signal wording is historical, not a new grade or certification in this work.", "condition_status": "Partly verified", "status_reason": "This state links partial information and gaps in the existing stored summary. External verification and clinical content review remain incomplete; it does not certify fulfilled conditions, efficacy, safety, prespecification or independence.", "missingness": "New material, condition revisions and verdict changes are separate events after content review. The original date is not used as a current search or external reading date.", "uncertainty": "Group-, stratum- and time-specific denominators, CIs for the relevant contrasts and adjusted effects, prespecified hierarchy, actual exposure/adherence, shared trials/participants and long-term or harm details remain unverified. Existing calculations and historical checks are not converted into new calculations, external reading or completed clinical review in this work.", "review_date": null, "reading_status": "Full text not read · Stored summary read", "additional_material": "New material, condition revisions and verdict changes are separate events after content review. The original date is not used as a current search or external reading date." } ], "reports": [ { "report_id": "R01", "title": "Huang et al. 2005", "url": "https://pubmed.ncbi.nlm.nih.gov/15934094/", "report_type": "Stored summary of a double-blind placebo trial", "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing stored review summary read; external material unread", "study_family": "Distinguish 3 direct placebo, active-allopurinol and single-agent drink comparisons from 1 pooled review; within- versus between-group results, strata/periods, disease, denominators/shared trials and independent replication remain unverified", "independent_replication": "Reports are distinguished from unique trials, independent teams and participant totals; these are not certified here", "observed_result": "C change −0.5 mg/dL (95% CI −0.6, −0.3), placebo +0.09 (−0.05, 0.2), between-group P<.0001. The existing net change −0.59 mg/dL is a calculation without its own 95% CI.", "result_level": "This concerns 184 participants over 2 months. Group allocation and final analysis denominators remain unverified. CIs for group-specific changes are not transferred into the between-group difference or a flare outcome.", "source_evidence_date": "2026-09-07", "materials": [ { "material_type": "Stored existing review summary", "public_status": "Preserved copy of the complete existing review summary", "access_status": "Stored summary", "acquired": true, "actually_read": "Summary read", "as_of": "2026-10-06T12:55:15.434420+09:00", "qualification": "PMID15934094 · DOI10.1002/art.21105 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External abstract", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID15934094 · DOI10.1002/art.21105 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External full text", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID15934094 · DOI10.1002/art.21105 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Registration material", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID15934094 · DOI10.1002/art.21105 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Protocol and analysis plan", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID15934094 · DOI10.1002/art.21105 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." } ], "links": [ { "label": "PubMed", "url": "https://pubmed.ncbi.nlm.nih.gov/15934094/" } ] }, { "report_id": "R02", "title": "Stamp et al. 2013", "url": "https://pubmed.ncbi.nlm.nih.gov/23681955/", "report_type": "Open-label randomized active-drug comparison pilot in established gout", "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing stored review summary read; external material unread", "study_family": "Distinguish 3 direct placebo, active-allopurinol and single-agent drink comparisons from 1 pooled review; within- versus between-group results, strata/periods, disease, denominators/shared trials and independent replication remain unverified", "independent_replication": "Reports are distinguished from unique trials, independent teams and participant totals; these are not certified here", "observed_result": "Urate reductions of 0.23 versus 1.9 mg/dL, P<.001. The exact adjusted between-group 95% CI remains unverified. This compares a smaller response with allopurinol; it is not a placebo test of no C effect.", "result_level": "Among 40 participants, allocation occurred within strata of 20 existing allopurinol users and 20 nonusers. ACTRN12610000545066 is a paper-reported identifier; official details, change history and plan compliance remain unverified.", "source_evidence_date": "2026-09-07", "materials": [ { "material_type": "Stored existing review summary", "public_status": "Preserved copy of the complete existing review summary", "access_status": "Stored summary", "acquired": true, "actually_read": "Summary read", "as_of": "2026-10-06T12:55:15.434420+09:00", "qualification": "PMID23681955 · DOI10.1002/art.37925 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External abstract", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID23681955 · DOI10.1002/art.37925 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External full text", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID23681955 · DOI10.1002/art.37925 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Registration material", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID23681955 · DOI10.1002/art.37925 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Protocol and analysis plan", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID23681955 · DOI10.1002/art.37925 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." } ], "links": [ { "label": "PubMed", "url": "https://pubmed.ncbi.nlm.nih.gov/23681955/" } ] }, { "report_id": "R03", "title": "Enderle et al. 2026", "url": "https://link.springer.com/article/10.1007/s00394-026-03905-z", "report_type": "Randomized drink comparison with two study groups and two periods", "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing stored review summary read; external material unread", "study_family": "Distinguish 3 direct placebo, active-allopurinol and single-agent drink comparisons from 1 pooled review; within- versus between-group results, strata/periods, disease, denominators/shared trials and independent replication remain unverified", "independent_replication": "Reports are distinguished from unique trials, independent teams and participant totals; these are not certified here", "observed_result": "Model mean±SE: C 6.02±.20→5.54±.20 (week 1)→5.71±.20 (week 2), control 5.86±.20→5.76±.20→5.86±.20. Within-C week 1 P<.01; the original account states no detected time-specific between-group difference.", "result_level": "The 43 assigned, 40 analysed and 20 each for C and control drinks are distinguished. Not all participants received all four drinks; C+hesperidin is excluded from single-agent confirmation. Official NCT04316390 history and hierarchy remain unverified.", "source_evidence_date": "2026-09-07", "materials": [ { "material_type": "Stored existing review summary", "public_status": "Preserved copy of the complete existing review summary", "access_status": "Stored summary", "acquired": true, "actually_read": "Summary read", "as_of": "2026-10-06T12:55:15.434420+09:00", "qualification": "PMID41739218 · DOI10.1007/s00394-026-03905-z is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External abstract", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID41739218 · DOI10.1007/s00394-026-03905-z is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External full text", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID41739218 · DOI10.1007/s00394-026-03905-z is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Registration material", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID41739218 · DOI10.1007/s00394-026-03905-z is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Protocol and analysis plan", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID41739218 · DOI10.1007/s00394-026-03905-z is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." } ], "links": [ { "label": "Official source", "url": "https://link.springer.com/article/10.1007/s00394-026-03905-z" } ] }, { "report_id": "R04", "title": "Juraschek et al. 2011", "url": "https://pubmed.ncbi.nlm.nih.gov/21671418/", "report_type": "Bibliography and summary of a pooled review of randomized trials", "existence": "Displayed reports, citations, results and gaps exist in the stored summary. External availability, acquisition, content and reading of detailed materials remain separately unverified.", "acquired_read": "Existing stored review summary read; external material unread", "study_family": "Distinguish 3 direct placebo, active-allopurinol and single-agent drink comparisons from 1 pooled review; within- versus between-group results, strata/periods, disease, denominators/shared trials and independent replication remain unverified", "independent_replication": "Reports are distinguished from unique trials, independent teams and participant totals; these are not certified here", "observed_result": "The existing citation records an average −0.35 mg/dL across 13 RCTs and substantial heterogeneity.", "result_level": "PMCID PMC3169708 is retained in the original bibliography. Inclusion, extraction, shared trials, denominators and exact CIs remain unverified. The review is not added as a new primary trial and participants are not summed.", "source_evidence_date": "2026-09-07", "materials": [ { "material_type": "Stored existing review summary", "public_status": "Preserved copy of the complete existing review summary", "access_status": "Stored summary", "acquired": true, "actually_read": "Summary read", "as_of": "2026-10-06T12:55:15.434420+09:00", "qualification": "PMID21671418 · DOI10.1002/acr.20519 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External abstract", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID21671418 · DOI10.1002/acr.20519 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "External full text", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID21671418 · DOI10.1002/acr.20519 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Registration material", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID21671418 · DOI10.1002/acr.20519 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." }, { "material_type": "Protocol and analysis plan", "public_status": "Original bibliographic link or needed material; external public availability/access status unverified", "access_status": "Unread; access not attempted", "acquired": false, "actually_read": "Not read", "as_of": null, "qualification": "PMID21671418 · DOI10.1002/acr.20519 is retained in the existing stored record. External abstracts, full text, registration, protocols and analysis plans are unread. Historical checks or the existence of registration identifiers or a PMCID do not establish current reading, prespecification or independence. The stored-summary date is its original production timestamp; dates for unread external materials are empty. The existing evidence date is distinguished from any current external reading date." } ], "links": [ { "label": "PubMed", "url": "https://pubmed.ncbi.nlm.nih.gov/21671418/" } ] } ], "method_sources": [ { "id": "M03", "version": "Cochrane Handbook 6.5 (2024), chapter updated 2023-08", "url": "https://www.cochrane.org/authors/handbooks-and-manuals/handbook/current/chapter-03", "section": "§3.1, §3.2.1–3.2.3, MECIR C5/C7/C13", "official_principle": "Clearly record the question, eligibility conditions and reasons for changes, and distinguish variations in interventions.", "review_level": "Existing methodological links were reused for production. External originals were not reread and methodological content was not reassessed." }, { "id": "M04", "version": "Cochrane Handbook 6.5.1 (2025), chapter updated 2025-03", "url": "https://www.cochrane.org/authors/handbooks-and-manuals/handbook/current/chapter-04", "section": "§4.5, §4.6.1–4.6.3, MECIR C42", "official_principle": "Distinguish studies from reports and link them; do not omit a study solely because results are unreported.", "review_level": "Existing methodological links were reused for production. External originals were not reread and methodological content was not reassessed." }, { "id": "M08", "version": "Cochrane Handbook 6.5 (2024), chapter updated 2019-10", "url": "https://www.cochrane.org/authors/handbooks-and-manuals/handbook/current/chapter-08", "section": "§8.1–8.2.3, Table 8.2.a", "official_principle": "Define the outcome and effect of interest, then examine randomization, deviations, missing data, measurement and selective reporting.", "review_level": "Existing methodological links were reused for production. External originals were not reread and methodological content was not reassessed." }, { "id": "M15", "version": "Cochrane Handbook 6.5 (2024), chapter updated 2023-08", "url": "https://www.cochrane.org/authors/handbooks-and-manuals/handbook/current/chapter-15", "section": "§15.2.4, §15.3.1–15.3.3", "official_principle": "Distinguish effect estimates, intervals, importance and applicability. Sample size alone does not determine precision.", "review_level": "Existing methodological links were reused for production. External originals were not reread and methodological content was not reassessed." }, { "id": "M19", "version": "Cochrane Handbook 6.5 (2024), chapter updated 2019-10", "url": "https://www.cochrane.org/authors/handbooks-and-manuals/handbook/current/chapter-19", "section": "§19.1.2, §19.2.1–19.2.4", "official_principle": "Harm questions may require different designs, populations and follow-up from efficacy questions. Case reports do not establish incidence rates.", "review_level": "Existing methodological links were reused for production. External originals were not reread and methodological content was not reassessed." } ], "status_dictionary": { "Partly verified": "Partial information from the stored summary is linked; detailed originals and content review remain incomplete.", "Unverified": "Required details cannot be established within the preserved scope. This does not establish absence of effects or studies, or safety.", "Review incomplete": "Review of existing content remains incomplete.", "Met": "This state is used only within the relevant conditions after material verification and content review. It was not automatically assigned in this work.", "Not reported": "Unreported within material actually read. Unread external material is not relabeled as unreported.", "Inaccessible": "This means actual access failure. External access was not attempted in this work, so this state was not assigned.", "Not applicable": "Used only with an application exception and reason based on the question scope.", "Conflicting data": "This requires actual comparison of materials; no new conflict judgment was made in this work.", "Insufficient evidence for the conditions": "This indicates gaps in additional material for the selected conditions. Unread material as a whole is not converted into an efficacy grade." }, "study_overlap": { "state": "Unverified", "unique_trial_count": null, "unique_participant_count": null, "reason": "The 4 stored reports comprise 3 trial reports involving direct placebo, active allopurinol and single-agent C drink comparisons plus 1 pooled-review bibliography. Groups, strata, periods, disease and included/shared samples are distinguished; unique trial/participant totals and independent replication remain unverified." }, "history": [ { "date": "2026-10-22", "kind": "Separation of public-facing pages and materials", "view_version": "1.0", "change": "Public-facing views and materials were prepared from the existing 33 items. No new clinical search, verification-status change or scoring was performed." } ], "language": "en", "translation_date": "2026-10-22" }