Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

88 questions · 88 findings · 39 reviews · Headline outcomes only

No studies found 47 · 53.4%GRADE not reported 4 · 4.5%Very low 5 · 5.7%Low 16 · 18.2%Moderate 14 · 15.9%High 2 · 2.3%