Zinc vs no zinc supplementation: Preterm birth
- Population
- Normal pregnant women with no systemic illness
- Intervention
- Zinc
- Comparison
- no zinc supplementation
- Outcome
- Preterm birth
Zinc supplementation probably leads to lower preterm birth compared with no zinc (with or without placebo) (moderate certainty).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Zinc supplementation vs no zinc (with or without placebo) Preterm birth · Normal pregnant women with no systemic illness Zinc supplementation probably leads to lower preterm birth compared with no zinc (with or without placebo) (moderate certainty). Zinc supplementation for improving pregnancy and infant outcome (2015) · Cochrane Headline outcomes onlyearlier version CD000230.PUB5, superseded | RR 0.86 [0.76, 0.97] | 16 studies · 7637 participants | Moderate |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Zinc supplementation for improving pregnancy and infant outcome 2021 · 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.
- Zinc vs no zinc supplementation · Pregnant women (healthy and probable zinc deficiency) · 1 review
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.