Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

204 questions · 209 findings · 119 reviews · Headline outcomes only

No studies found 35 · 16.7%GRADE not reported 8 · 3.8%Very low 56 · 26.8%Low 68 · 32.5%Moderate 35 · 16.7%High 7 · 3.3%