Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

141 questions · 155 findings · 23 reviews · Headline outcomes only

No studies found 50 · 32.3%GRADE not reported 1 · 0.6%Very low 27 · 17.4%Low 39 · 25.2%Moderate 28 · 18.1%High 10 · 6.5%