Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

139 questions · 145 findings · 63 reviews

No studies found 81 · 55.9%GRADE not reported 2 · 1.4%Very low 24 · 16.6%Low 25 · 17.2%Moderate 12 · 8.3%High 1 · 0.7%