Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

121 questions · 128 findings · 18 reviews · Headline outcomes only

No studies found 21 · 16.4%GRADE not reported 4 · 3.1%Very low 40 · 31.3%Low 40 · 31.3%Moderate 20 · 15.6%High 3 · 2.3%