Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

510 questions · 532 findings · 49 reviews · Headline outcomes only

No studies found 120 · 22.6%GRADE not reported 34 · 6.4%Very low 146 · 27.4%Low 138 · 25.9%Moderate 75 · 14.1%High 19 · 3.6%