Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

285 questions · 327 findings · 36 reviews · Headline outcomes only

No studies found 129 · 39.4%GRADE not reported 11 · 3.4%Very low 82 · 25.1%Low 64 · 19.6%Moderate 38 · 11.6%High 3 · 0.9%