Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

270 questions · 272 findings · 19 reviews · Headline outcomes only

No studies found 75 · 27.6%GRADE not reported 51 · 18.8%Very low 80 · 29.4%Low 56 · 20.6%Moderate 10 · 3.7%High 0 · 0%