Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

489 questions · 532 findings · 33 reviews · Headline outcomes only

No studies found 55 · 10.3%GRADE not reported 28 · 5.3%Very low 119 · 22.4%Low 167 · 31.4%Moderate 129 · 24.2%High 34 · 6.4%