Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

181 questions · 190 findings · 14 reviews · Headline outcomes only

No studies found 92 · 48.4%GRADE not reported 1 · 0.5%Very low 64 · 33.7%Low 25 · 13.2%Moderate 7 · 3.7%High 1 · 0.5%