Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

212 questions · 217 findings · 28 reviews · Headline outcomes only

No studies found 53 · 24.4%GRADE not reported 6 · 2.8%Very low 24 · 11.1%Low 69 · 31.8%Moderate 47 · 21.7%High 18 · 8.3%