Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

668 questions · 685 findings · 68 reviews · Headline outcomes only

No studies found 181 · 26.4%GRADE not reported 16 · 2.3%Very low 151 · 22%Low 211 · 30.8%Moderate 98 · 14.3%High 28 · 4.1%