Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

241 questions · 259 findings · 26 reviews · Headline outcomes only

No studies found 52 · 20.1%GRADE not reported 20 · 7.7%Very low 76 · 29.3%Low 73 · 28.2%Moderate 27 · 10.4%High 11 · 4.2%