Vitamin D vs no treatment/placebo (no vitamin or minerals): Low birthweight
- Population
- women during pregnancy
- Intervention
- Vitamin D
- Comparison
- no treatment/placebo (no vitamin or minerals)
- Outcome
- Low birthweight
Vitamin D alone probably leads to lower low birthweight (less than 2500 g) (ALL) compared with no treatment/placebo (no vitamins or minerals) (moderate certainty).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Vitamin D alone vs no treatment/placebo (no vitamins or minerals) Low birthweight (less than 2500 g) (ALL) · women during pregnancy Vitamin D alone probably leads to lower low birthweight (less than 2500 g) (ALL) compared with no treatment/placebo (no vitamins or minerals) (moderate certainty). Vitamin D supplementation for women during pregnancy (2016) · Cochrane Headline outcomes onlyearlier version CD008873.PUB3, superseded | RR 0.4 [0.24, 0.67] | 3 studies · 493 participants | Moderate |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Vitamin D supplementation for women during pregnancy 2019 · 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.
- Vitamin D vs placebo or no intervention · pregnant women and their infants.. · 1 review
- Vitamin D vs placebo or control · pregnant women · 1 review
- Vitamin D vs no treatment/placebo (no vitamin or minerals) · pregnant women · 0 reviews
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.