Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

329 questions · 345 findings · 47 reviews · Headline outcomes only

No studies found 93 · 27%GRADE not reported 8 · 2.3%Very low 44 · 12.8%Low 118 · 34.2%Moderate 75 · 21.7%High 7 · 2%