Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

395 questions · 404 findings · 37 reviews · Headline outcomes only

No studies found 83 · 20.5%GRADE not reported 41 · 10.1%Very low 127 · 31.4%Low 115 · 28.5%Moderate 38 · 9.4%High 0 · 0%