Wedge pillow,
does it really help with Relief of nocturnal gastroesophageal reflux symptoms?
research showsThe grade is C with 50 points. In a 24-person four-week trial, week-4 NGSSIQ was 30.01 (SE 1.97) with a wedge plus morning PPI and 36.33 (SE 1.96) with morning and evening PPI. The reported difference was -6.32 points. The confidence interval in the public abstract is arithmetically asymmetric around that difference, and the correct value could not be verified in the article tables or supplement. The 15-point margin was chosen by the investigators and was not separately validated as an anchor-based patient minimal important difference.
ads claimA claim that the wedge beat a flat pillow would misstate the comparator. The direct trial compared it with adding an evening PPI.
Useful facts when choosing a product
- The direct trial used approximately 20 cm of wedge elevation and an evening-PPI comparator.
- A five-trial, 228-participant review could not pool the heterogeneous elevation studies.
- Commercial wedge height and angle vary and are not interchangeable with whole-bed elevation.
Chamgap Semantic Classification Code
Candidate index · review held
UNK.wedge-pillow.UNK.nocturnal-gastroesophageal-reflux-symptoms.relieve.noneUnknown > Wedge pillow > Unknown > nocturnal gastroesophageal reflux symptoms > Symptom-relief claim > No intervention
An automated migration candidate, not an issued permanent code; exact claim scope remains under review. This machine-generated migration candidate helps retrieval but is not a permanent assignment. The original verdict ID and URL remain authoritative.
What the research actually shows
Hirunrattanaporn 2026 randomized patients with at least twice-weekly nocturnal heartburn or regurgitation despite morning PPI. The wedge arm added approximately 20 cm of head elevation; the comparator added an evening PPI. NGSSIQ at week 4 was the main efficacy assessment, with quality of life, sleep measures, and pH-impedance as additional outcomes. Adherence was monitored with a pressure sensor; the actual adherence rate and arm-level attrition could not be verified in the accessible report. Week-4 NGSSIQ was 30.01 (SE 1.97) versus 36.33 (SE 1.96), with a reported difference of -6.32 points. The confidence interval in the public abstract is arithmetically asymmetric around that difference, and the correct value could not be verified in the article tables or supplement. The 15-point margin was chosen by the investigators and was not separately validated as an anchor-based patient minimal important difference. Funding was listed as “RA67/028/Ratchadapiseksompotch Fund.” One author disclosed involvement in developing the evaluated product but stated that no financial support was provided for it.
Why this is classified as C (50)
One small, four-week, active-control noninferiority trial with multiple avoidable limitations supports no grade above C.
Counterpoint. In the IBELGA crossover trial, a 20 cm bed-head elevation produced a 10% RDQ response in 27/39 periods versus 13/39 without incline, RR 2.08 (95% CI 1.19-3.61), but this was whole-bed elevation, not a wedge pillow.
Rejudgment record. Cross-check applied — Direct wedge evidence was separated from whole-bed elevation by intervention, comparator, and estimand.
| Endpoint | P | Symptom or function itself is the target - including patient reports and performance tests |
| Replication | R1 | Single confirmatory trial |
| Independence | I1 | Mixed funding sources |
| Effect size | E+ | Meets the clinically important threshold |
Stored derived and displayed grades match; this is not a current recalculation or validity check (C).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| A wedge pillow relieves nocturnal gastroesophageal reflux symptoms | C | A small four-week noninferiority trial and heterogeneous bed-elevation studies suggest benefit without strong confirmation. |
Cross-check — AI research and Codex final gate
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Hirunrattanaporn et al. 2026 | 24-participant, four-week randomized noninferiority trial | 24 randomized; arm-level attrition was not available in the public abstract | RA67/028/Ratchadapiseksompotch Fund | Patient-reported NGSSIQ at week 4 | 30.01 (SE 1.97) versus 36.33 (SE 1.96); difference -6.32; the asymmetric CI in the public abstract could not be verified in the article tables or supplement | Direct evidence |
| Villamil Morales et al. 2020 (IBELGA) | 39-participant 2x2 crossover trial of 20 cm bed-head elevation | 39 analyzed | Funding statement could not be verified in the accessible source | At least 10% RDQ improvement over six weeks | 27/39 versus 13/39; RR 2.08, 95% CI 1.19-3.61 | Indirect support |
Receipt — 3 References
All 3 cited sources were verified for existence at the original page (as of 2026-08-07).
Final verification and publication gate: Codex · Evidence date: 2026-08-07 · Corrections: none
Cite this verdict
[Chamgap] Wedge pillow × nocturnal gastroesophageal reflux symptom relief — Evidence Grade C·50. 3 cited sources checked. Source: https://chamgap.com/en/verdicts/gut/wedge-pillow-nocturnal-gastroesophageal-reflux-symptoms/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.