Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

172 questions · 185 findings · 106 reviews

No studies found 53 · 28.6%GRADE not reported 8 · 4.3%Very low 47 · 25.4%Low 47 · 25.4%Moderate 26 · 14.1%High 4 · 2.2%