Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

298 questions · 307 findings · 39 reviews · Headline outcomes only

No studies found 46 · 15%GRADE not reported 4 · 1.3%Very low 97 · 31.6%Low 83 · 27%Moderate 57 · 18.6%High 20 · 6.5%