Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

125 questions · 127 findings · 38 reviews · Headline outcomes only

No studies found 24 · 18.9%GRADE not reported 4 · 3.1%Very low 20 · 15.7%Low 38 · 29.9%Moderate 25 · 19.7%High 16 · 12.6%