Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

204 questions · 206 findings · 24 reviews · Headline outcomes only

No studies found 98 · 47.6%GRADE not reported 4 · 1.9%Very low 54 · 26.2%Low 43 · 20.9%Moderate 6 · 2.9%High 1 · 0.5%