Any supplements containing iron and folic acid vs same supplements without iron nor folic acid (no iron nor folic acid or placebo): Low birthweight
It is very uncertain whether any supplements containing iron and folic acid changes low birthweight (less than 2500 g) compared with same supplements without iron nor folic acid (no iron nor folic acid… (very low certainty).
What each review found
Current versions only| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Any supplements containing iron and folic acid vs same supplements without iron nor folic acid (no iron nor folic acid or placebo) Low birthweight (less than 2500 g) · women during pregnancy It is very uncertain whether any supplements containing iron and folic acid changes low birthweight (less than 2500 g) compared with same supplements without iron nor folic acid (no iron nor folic acid… (very low certainty). Daily oral iron supplementation during pregnancy (2012) · Cochrane Headline outcomes onlyearlier version CD004736.PUB4, superseded | RR 1.07 [0.31, 3.74] | 2 studies · 1311 participants | Very low |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Daily oral iron supplementation during pregnancy 2015 · Cochrane Headline outcomes only | Not reported | list not extracted yet | Not assessed |
Studies behind the findings
None of these reviews ties its included studies to this outcome in the data here. Cochrane reviews and reviews with headline outcomes only do not list their studies yet.
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.