Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

70 questions · 70 findings · 44 reviews · Pregnancy and Childbirth

No studies found 5 · 7.1%GRADE not reported 16 · 22.9%Very low 14 · 20%Low 23 · 32.9%Moderate 10 · 14.3%High 2 · 2.9%

Technique of BP measurement: Korotkoff phase IV vs Korotkoff phase V to represent diastolic BP

Perinatal mortality · pregnant women with diastolic hypertension

Technique of BP measurement: Korotkoff phase IV showed no clear difference in perinatal mortality compared with korotkoff phase V to represent diastolic BP (low certainty).

1 finding from 1 review

Immediate vs deferred delivery of the preterm baby with suspected fetal compromise

Extended perinatal mortality · pregnant women at less than 36 weeks' gestation in whom there is clinical suspicion of fetal compromise

Immediate showed no clear difference in extended perinatal mortality compared with deferred delivery of the preterm baby with suspected fetal compromise (moderate certainty).

1 finding from 1 review

Intervention not reported

Perinatal mortality · women with a previous stillbirth of > 20 weeks' gestation who are pregnant or considering a subsequent pregnancy

It is very uncertain whether the intervention changes perinatal mortality (very low certainty).

1 finding from 1 review

Intervention not reported

Perinatal mortality · women undergoing home monitoring for preventing preterm birth versus women receiving standard care

The intervention showed no clear difference in perinatal mortality (low certainty).

1 finding from 1 review

Adverse event outcomes for dietary combined with physical activity interventions vs standard‐of‐care therapy

Perinatal mortality · pregnant women, excluding women already diagnosed with GDM in this pregnancy and those with pre‐existing diabetes mellitus

Combined diet and exercise interventions showed no clear difference in perinatal mortality compared with standard care (child) (low certainty).

1 finding from 1 review

Any supplement containing iodine vs same supplement without iodine or no treatment/placebo (maternal outcomes)

Perinatal mortality · women during the preconception, pregnancy and postpartum period

Any supplement containing iodine showed no clear difference in perinatal mortality compared with same supplement without iodine or no treatment/placebo (child… (low certainty).

1 finding from 1 review