Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

127 questions · 139 findings · 15 reviews · Headline outcomes only

No studies found 25 · 18%GRADE not reported 1 · 0.7%Very low 60 · 43.2%Low 36 · 25.9%Moderate 15 · 10.8%High 2 · 1.4%