Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

246 questions · 262 findings · 25 reviews · Headline outcomes only

No studies found 40 · 15.3%GRADE not reported 11 · 4.2%Very low 78 · 29.8%Low 74 · 28.2%Moderate 50 · 19.1%High 9 · 3.4%