Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

78 questions · 83 findings · 13 reviews · Headline outcomes only

No studies found 12 · 14.5%GRADE not reported 1 · 1.2%Very low 23 · 27.7%Low 28 · 33.7%Moderate 15 · 18.1%High 4 · 4.8%