Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

589 questions · 615 findings · 63 reviews · Headline outcomes only

No studies found 116 · 18.9%GRADE not reported 59 · 9.6%Very low 206 · 33.5%Low 156 · 25.4%Moderate 78 · 12.7%High 0 · 0%