Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

704 questions · 710 findings · 81 reviews · Headline outcomes only

No studies found 227 · 32%GRADE not reported 38 · 5.4%Very low 178 · 25.1%Low 178 · 25.1%Moderate 80 · 11.3%High 9 · 1.3%