Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

241 questions · 254 findings · 39 reviews · Headline outcomes only

No studies found 73 · 28.7%GRADE not reported 22 · 8.7%Very low 77 · 30.3%Low 55 · 21.7%Moderate 27 · 10.6%High 0 · 0%