Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

334 questions · 356 findings · 30 reviews · Headline outcomes only

No studies found 133 · 37.4%GRADE not reported 9 · 2.5%Very low 102 · 28.7%Low 73 · 20.5%Moderate 36 · 10.1%High 3 · 0.8%