Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

211 questions · 214 findings · 24 reviews · Headline outcomes only

No studies found 44 · 20.6%GRADE not reported 12 · 5.6%Very low 91 · 42.5%Low 61 · 28.5%Moderate 5 · 2.3%High 1 · 0.5%