Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

301 questions · 304 findings · 123 reviews · Headline outcomes only

No studies found 90 · 29.6%GRADE not reported 44 · 14.5%Very low 43 · 14.1%Low 57 · 18.8%Moderate 64 · 21.1%High 6 · 2%