Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

502 questions · 511 findings · 20 reviews · Headline outcomes only

No studies found 76 · 14.9%GRADE not reported 169 · 33.1%Very low 107 · 20.9%Low 92 · 18%Moderate 46 · 9%High 21 · 4.1%