Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

235 questions · 242 findings · 27 reviews · Headline outcomes only

No studies found 48 · 19.8%GRADE not reported 9 · 3.7%Very low 65 · 26.9%Low 62 · 25.6%Moderate 48 · 19.8%High 10 · 4.1%