Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

345 questions · 361 findings · 48 reviews · Headline outcomes only

No studies found 122 · 33.8%GRADE not reported 8 · 2.2%Very low 103 · 28.5%Low 87 · 24.1%Moderate 37 · 10.2%High 4 · 1.1%