Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

219 questions · 233 findings · 21 reviews · Headline outcomes only

No studies found 83 · 35.6%GRADE not reported 24 · 10.3%Very low 57 · 24.5%Low 50 · 21.5%Moderate 19 · 8.2%High 0 · 0%