Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

493 questions · 509 findings · 56 reviews · Headline outcomes only

No studies found 149 · 29.3%GRADE not reported 9 · 1.8%Very low 128 · 25.1%Low 123 · 24.2%Moderate 79 · 15.5%High 21 · 4.1%