Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

227 questions · 258 findings · 32 reviews

No studies found 68 · 26.4%GRADE not reported 32 · 12.4%Very low 47 · 18.2%Low 70 · 27.1%Moderate 34 · 13.2%High 7 · 2.7%