Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,532 questions · 2,642 findings · 483 reviews · Headline outcomes only

No studies found 534 · 20.2%GRADE not reported 82 · 3.1%Very low 641 · 24.3%Low 807 · 30.5%Moderate 472 · 17.9%High 106 · 4%

Intervention not reported

Effect on systolic blood pressure (mean difference in systolic blood pressure) · adults with primary hypertension

The intervention showed no clear difference in effect on systolic blood pressure (mean difference in systolic blood… (moderate certainty).

1 finding from 1 review

Intervention not reported

Effect on diastolic blood pressure (mean difference in diastolic blood pressure) · adults with primary hypertension

The intervention showed no clear difference in effect on diastolic blood pressure (mean difference in diastolic… (moderate certainty).

1 finding from 1 review

Intervention not reported

Any adverse event · adults with primary hypertension

The intervention showed no clear difference in any adverse event (low certainty).

1 finding from 1 review

Intervention not reported

Adverse event leading to withdrawal · adults with primary hypertension

The intervention showed no clear difference in adverse event leading to withdrawal (low certainty).

1 finding from 1 review

Planned early birth vs expectant management

Maternal mortality or morbidity · pregnant women with hypertensive disorders from 34 weeks' gestation to term

Planned early delivery leads to lower composite maternal mortality and morbidity compared with expectant management (high certainty).

1 finding from 1 review