Question · asked by 1 review
Summary of findings table ‐ Vitamin B12 supplementation vs no supplementation or placebo: Preterm birth
- Population
- pregnant women
- Intervention
- Summary of findings table ‐ Vitamin B12 supplementation
- Comparison
- no supplementation or placebo
- Outcome
- Preterm birth
Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in preterm birth (< 37 weeks) compared with placebo/no vitamin B12 supplementation (low certainty).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Summary of findings table ‐ Vitamin B12 supplementation vs placebo/no vitamin B12 supplementation Preterm birth (< 37 weeks) · pregnant women Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in preterm birth (< 37 weeks) compared with placebo/no vitamin B12 supplementation (low certainty). Vitamin B12 supplementation during pregnancy for maternal and child health outcomes (2024) · Cochrane Headline outcomes only | RR 0.97 [0.55, 1.74] | 2 studies · 340 participants | Low |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Vitamin B12 supplementation during pregnancy for maternal and child health outcomes 2024 · Cochrane Headline outcomes only | Not reported | Not extracted | Not assessed |
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.