Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

132 questions · 134 findings · 11 reviews · Headline outcomes only

No studies found 64 · 47.8%GRADE not reported 2 · 1.5%Very low 37 · 27.6%Low 21 · 15.7%Moderate 9 · 6.7%High 1 · 0.7%