Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

304 questions · 332 findings · 36 reviews · Headline outcomes only

No studies found 58 · 17.5%GRADE not reported 15 · 4.5%Very low 104 · 31.3%Low 110 · 33.1%Moderate 44 · 13.3%High 1 · 0.3%