Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

510 questions · 513 findings · 62 reviews · Headline outcomes only

No studies found 96 · 18.7%GRADE not reported 13 · 2.5%Very low 181 · 35.3%Low 121 · 23.6%Moderate 69 · 13.5%High 33 · 6.4%