Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

567 questions · 599 findings · 114 reviews

No studies found 136 · 22.7%GRADE not reported 45 · 7.5%Very low 166 · 27.7%Low 152 · 25.4%Moderate 75 · 12.5%High 25 · 4.2%

Any antihypertensive drug vs no antihypertensive drugs/placebo

Admission to neonatal or intensive care nursery · women with mild to moderate hypertension during pregnancy

Any antihypertensive drug showed no clear difference in admission to neonatal or intensive care nursery compared with no antihypertensive drugs/placebo (low certainty).

1 finding from 1 review

Intervention not reported

Maternal admission to intensive care · pregnant women

The intervention showed no clear difference in maternal admission to intensive care (low certainty).

1 finding from 1 review

Perioperative alcohol cessation intervention vs treatment

Postoperative complications after perioperative intervention (e.g. wound‐related complications, secondary surgery, cardiopulmonary complications, admission to intensive care) defined by need for treatment · adult surgical patients consuming 3 or more units of alcohol per day

Perioperative alcohol cessation intervention probably leads to lower postoperative complications after perioperative intervention (e.g.… compared with treatment (moderate certainty).

1 finding from 1 review

Intervention not reported

Social support vs less intensive interventions 9 · Pregnant women who smoke

The intervention showed no clear difference in social support vs less intensive interventions 9 (high certainty).

1 finding from 1 review

Planned early birth vs expectant management

Admission to neonatal intensive care unit · preterm prelabour rupture of membranes (PPROM)

Planned early birth probably leads to higher admission to neonatal intensive care compared with expectant management (moderate certainty).

1 finding from 1 review