Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

186 questions · 191 findings · 36 reviews · Headline outcomes only

No studies found 19 · 9.9%GRADE not reported 13 · 6.8%Very low 68 · 35.6%Low 55 · 28.8%Moderate 26 · 13.6%High 10 · 5.2%