Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

143 questions · 151 findings · 35 reviews · Headline outcomes only

No studies found 19 · 12.6%GRADE not reported 30 · 19.9%Very low 27 · 17.9%Low 39 · 25.8%Moderate 33 · 21.9%High 3 · 2%

Mortality: prone position vs supine

Subgroup analysis of longer‐term mortality: enrolment ≤ 48 hours after entry criteria/ventilationAlive or dead · adults with acute respiratory failure

Mortality: prone position probably leads to lower subgroup analysis of longer‐term mortality: enrolment ≤ 48 hours… compared with supine (moderate certainty).

1 finding from 1 review

Exercise therapy vs a control strategy (no treatment, placebo or waiting list controls)

Recovered · patients with patellofemoral pain syndrome (symptoms > 3 weeks (1 study); symptoms > 1 month (3 studies); symptoms > 2 months (2 studies);…

It is very uncertain whether exercise therapy changes recovery (long‐term) Number of patients who had recovered or number… compared with a control strategy (no treatment, placebo or waiting list controls) (very low certainty).

1 finding from 1 review