Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

483 questions · 519 findings · 42 reviews · Headline outcomes only

No studies found 136 · 26.2%GRADE not reported 9 · 1.7%Very low 136 · 26.2%Low 150 · 28.9%Moderate 68 · 13.1%High 20 · 3.9%