Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

161 questions · 164 findings · 29 reviews · Headline outcomes only

No studies found 42 · 25.6%GRADE not reported 14 · 8.5%Very low 44 · 26.8%Low 43 · 26.2%Moderate 19 · 11.6%High 2 · 1.2%