Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

520 questions · 527 findings · 55 reviews · Headline outcomes only

No studies found 140 · 26.6%GRADE not reported 66 · 12.5%Very low 121 · 23%Low 115 · 21.8%Moderate 77 · 14.6%High 8 · 1.5%