Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,773 questions · 1,817 findings · 212 reviews · Headline outcomes only

No studies found 383 · 21.1%GRADE not reported 192 · 10.6%Very low 472 · 26%Low 444 · 24.4%Moderate 228 · 12.5%High 98 · 5.4%

PEEP vs zero end‐expiratory pressure (ZEEP) during mechanical ventilation

Postoperative mortality · adult participants given general anaesthesia

It is very uncertain whether PEEP changes postoperative mortality compared with zero end‐expiratory pressure (ZEEP) during mechanical ventilation (very low certainty).

1 finding from 1 review

PEEP vs zero end‐expiratory pressure (ZEEP) during mechanical ventilation

Pneumonia · adult participants given general anaesthesia

It is very uncertain whether PEEP changes pneumonia compared with zero end‐expiratory pressure (ZEEP) during mechanical ventilation (very low certainty).

1 finding from 1 review