Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

344 questions · 346 findings · 97 reviews · Headline outcomes only

No studies found 31 · 9%GRADE not reported 6 · 1.7%Very low 154 · 44.5%Low 99 · 28.6%Moderate 39 · 11.3%High 17 · 4.9%