Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

990 questions · 1,028 findings · 131 reviews · Headline outcomes only

No studies found 292 · 28.4%GRADE not reported 55 · 5.4%Very low 276 · 26.8%Low 240 · 23.3%Moderate 147 · 14.3%High 18 · 1.8%