Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

412 questions · 450 findings · 63 reviews · Headline outcomes only

No studies found 91 · 20.2%GRADE not reported 34 · 7.6%Very low 151 · 33.6%Low 113 · 25.1%Moderate 50 · 11.1%High 11 · 2.4%