Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

397 questions · 417 findings · 49 reviews · Headline outcomes only

No studies found 93 · 22.3%GRADE not reported 12 · 2.9%Very low 117 · 28.1%Low 108 · 25.9%Moderate 67 · 16.1%High 20 · 4.8%