Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

110 questions · 112 findings · 67 reviews · Headline outcomes only

No studies found 52 · 46.4%GRADE not reported 2 · 1.8%Very low 9 · 8%Low 13 · 11.6%Moderate 19 · 17%High 17 · 15.2%

Nifedipine vs placebo

Health‐related quality of life · primary dysmenorrhoea

The review found no eligible studies for this question.

1 finding from 1 review