Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

190 questions · 193 findings · 17 reviews · Headline outcomes only

No studies found 51 · 26.4%GRADE not reported 6 · 3.1%Very low 59 · 30.6%Low 55 · 28.5%Moderate 17 · 8.8%High 5 · 2.6%