Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

401 questions · 403 findings · 75 reviews · Headline outcomes only

No studies found 79 · 19.6%GRADE not reported 18 · 4.5%Very low 91 · 22.6%Low 110 · 27.3%Moderate 79 · 19.6%High 26 · 6.5%