Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

313 questions · 320 findings · 32 reviews · Headline outcomes only

No studies found 63 · 19.7%GRADE not reported 36 · 11.3%Very low 89 · 27.8%Low 102 · 31.9%Moderate 30 · 9.4%High 0 · 0%