Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

257 questions · 270 findings · 42 reviews · Headline outcomes only

No studies found 75 · 27.8%GRADE not reported 7 · 2.6%Very low 95 · 35.2%Low 50 · 18.5%Moderate 40 · 14.8%High 3 · 1.1%