Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

584 questions · 593 findings · 51 reviews · Airways

No studies found 37 · 6.2%GRADE not reported 40 · 6.7%Very low 44 · 7.4%Low 172 · 29%Moderate 232 · 39.1%High 68 · 11.5%