Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

126 questions · 127 findings · 45 reviews · Headline outcomes only

No studies found 28 · 22%GRADE not reported 23 · 18.1%Very low 13 · 10.2%Low 24 · 18.9%Moderate 35 · 27.6%High 4 · 3.1%