Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

254 questions · 255 findings · 98 reviews

No studies found 91 · 35.7%GRADE not reported 15 · 5.9%Very low 85 · 33.3%Low 36 · 14.1%Moderate 21 · 8.2%High 7 · 2.7%