Question · asked by 1 review
Calcium supplementation/fortification vs placebo or no intervention: Gestational age (preterm birth < 37 weeks)
- Population
- healthy pregnant women receiving calcium supplementation vs placebo or no treatment
- Intervention
- Calcium supplementation/fortification
- Comparison
- placebo or no intervention
- Outcome
- Gestational age (preterm birth < 37 weeks)
Calcium supplementation showed no clear difference in preterm birth (a) Birth prior to 37 weeks compared with placebo or no treatment (maternal outcomes) (moderate certainty).
What each review found
Include earlier review versions| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Calcium supplementation vs placebo or no treatment (maternal outcomes) Preterm birth (a) Birth prior to 37 weeks · healthy pregnant women receiving calcium supplementation vs placebo or no treatment Calcium supplementation showed no clear difference in preterm birth (a) Birth prior to 37 weeks compared with placebo or no treatment (maternal outcomes) (moderate certainty). Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and… (2015) · Cochrane Headline outcomes only | RR 0.86 [0.7, 1.05] | 13 studies · 16139 participants | Moderate |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes 2015 · 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.