Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

218 questions · 227 findings · 17 reviews · Headline outcomes only

No studies found 35 · 15.4%GRADE not reported 9 · 4%Very low 30 · 13.2%Low 71 · 31.3%Moderate 60 · 26.4%High 22 · 9.7%