Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

880 questions · 912 findings · 126 reviews · Headline outcomes only

No studies found 143 · 15.7%GRADE not reported 38 · 4.2%Very low 250 · 27.4%Low 253 · 27.7%Moderate 168 · 18.4%High 60 · 6.6%