Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

407 questions · 424 findings · 34 reviews · Headline outcomes only

No studies found 65 · 15.3%GRADE not reported 36 · 8.5%Very low 86 · 20.3%Low 133 · 31.4%Moderate 88 · 20.8%High 16 · 3.8%