Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

298 questions · 298 findings · 46 reviews · Headline outcomes only

No studies found 69 · 23.2%GRADE not reported 21 · 7%Very low 75 · 25.2%Low 66 · 22.1%Moderate 57 · 19.1%High 10 · 3.4%