Cardiac arrest & resuscitation

Lower versus higher oxygen targets after resuscitation from out-of-hospital cardiac arrest: A systematic review and meta-analysis of randomized controlled trials

J Crit CarePublished Systematic review and meta-analysis of randomised controlled trials

Pooled result · Short-term survival (in hospital or within 30 days)Result — go to the resultRR for short-term survival 0.98 95% CI 0.86–1.11

Authors' conclusion

Current evidence suggests that targeting a lower or higher oxygen therapy in patients after resuscitation from OHCA results in similar short-term survival and other clinical outcomes.

Study context

Population
Adults resuscitated from out-of-hospital cardiac arrest (OHCA)
Participants
1,454 adults · 7 randomized controlled trials (RCTs)
Comparison
Lower vs higher oxygen targets
Outcome
Short-term survival (in hospital or within 30 days)
Methodological detailssubgroup analyses by timing of study interventions, Quality of evidence ranged from moderate to very low
  • Subgroup analyses by timing of study interventions
  • Quality of evidence ranged from moderate to very low

Pooled result

As reported in the abstract

RR for short-term survival

0.98

95% CI 0.86–1.11

Lower oxygen targets vs Higher oxygen targets
RR for short-term survival 0.98 (95% CI 0.86–1.11)

Further pooled results

Survival at longest follow-up

No significant difference between lower and higher oxygen targets
1.01 (RR, 1.01; 95% CI, 0.91 to 1.14)

Favorable neurological outcome

No significant difference between lower and higher oxygen targets
1.00 (RR, 1.00; 95% CI, 0.91 to 1.11)

ICU LOS

No significant difference between lower and higher oxygen targets
−4.94 h (mean difference, −4.94 h; 95% CI, −14.83 to 4.96 h)

Re-arrest

No significant difference between lower and higher oxygen targets
0.68 (RR, 0.68; 95% CI, 0.21 to 2.19)

Original publication

Lower versus higher oxygen targets after resuscitation from out-of-hospital cardiac arrest: A systematic review and meta-analysis of randomized controlled trials. J Crit Care. Published 18 October 2023. doi:10.1016/j.jcrc.2023.154448

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