Question · asked by 1 review
Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes): Preterm birth
- Population
- women during the preconception, pregnancy and postpartum period
- Intervention
- Any supplement containing iodine
- Comparison
- same supplement without iodine or no treatment/placebo (maternal outcomes)
- Outcome
- Preterm birth
Any supplement containing iodine showed no clear difference in preterm birth compared with same supplement without iodine or no treatment/placebo (maternal… (low certainty).
What each review found
Include earlier review versions| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes) Preterm birth · women during the preconception, pregnancy and postpartum period Any supplement containing iodine showed no clear difference in preterm birth compared with same supplement without iodine or no treatment/placebo (maternal… (low certainty). Iodine supplementation for women during the preconception, pregnancy and postpartum period (2017) · Cochrane Headline outcomes only | RR 0.71 [0.3, 1.66] | 2 studies · 376 participants | Low |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Iodine supplementation for women during the preconception, pregnancy and postpartum period 2017 · 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.