Vitamin A vs placebo or no treatment: Preterm birth
- Population
- pregnant women
- Intervention
- Vitamin A
- Comparison
- placebo or no treatment
- Outcome
- Preterm birth
Vitamin A alone showed no clear difference in preterm birth compared with placebo or no treatment (high certainty).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Vitamin A alone vs placebo or no treatment Preterm birth · Pregnant women Vitamin A alone showed no clear difference in preterm birth compared with placebo or no treatment (high certainty). Vitamin A supplementation during pregnancy for maternal and newborn outcomes (2015) · Cochrane Headline outcomes only | RR 0.98 [0.94, 1.01] | 5 studies · 48007 participants | High |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Vitamin A supplementation during pregnancy for maternal and newborn outcomes 2015 · Cochrane Headline outcomes only | Not reported | Not extracted | Not assessed |
Related questions
The same intervention and outcome, asked in another population or against another comparator.
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How reviews are matched to this question
Reviews word the same question differently. Four decision models (TypeSafe's Jev, Liquid AI's d1-ultra, SubQ Snap and Baseten's Elephant) judged each wording of the population, intervention, comparator and outcome against the others; two wordings count as the same when at least three of them agree and none clearly disagrees, and findings count as this question only when all four elements match. Timing, setting and subgroup never split a question: they are shown on each finding.