Acute cardiac care & resuscitation

Sex-Specific Outcome Following Targeted Blood Pressure, Oxygenation, and Fever Control After Out-of-Hospital Cardiac Arrest

JACC AdvPublished Secondary analysis of the BOX randomised trial

Primary result · 1-year all-cause mortalityResult — go to the resultHazard ratio 1.27 95% CI 0.96–1.69

Authors' conclusion

Among comatose patients following OHCA, no differences were observed between sexes in 1-year mortality or the efficacy of the blood pressure, oxygen, or temperature intervention.

Study context

Population
Adult comatose out-of-hospital cardiac arrest (OHCA) patients (age ≥18 years) of presumed cardiac cause, randomised to mean arterial pressure (MAP) target 63 or 77 mm Hg, arterial oxygen 9–10 or 13–14 kPa, and fever prevention for 36 or 72 hours
Participants
789 patients
Comparison
Females vs males
  • Femalesn = 152
Primary endpoint
All-cause mortality
Follow-up
1 year
Methodological detailstwo-centre, factorial
  • Two-centre
  • Factorial

Primary result

1-year all-cause mortality

Hazard ratio

1.27

95% CI 0.96–1.69

By group

Females vs Males
HR 1.27 (95% CI 0.96–1.69)

As reported in the abstract

Further findings

Baseline age and ischemic heart disease

Ischemic heart disease Females 12% · Males 24%

Effect of MAP, oxygenation and fever-control interventions on mortality, by sex

None of the targeted interventions had a statistically significant impact on mortality for either sex
No mortality difference between sexes across the interventions

Original publication

Sex-Specific Outcome Following Targeted Blood Pressure, Oxygenation, and Fever Control After Out-of-Hospital Cardiac Arrest. JACC Adv. Published 20 August 2025. doi:10.1016/j.jacadv.2025.102056

Summarised from the published abstract; every number is checked against it

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