ICU sedation, delirium & recovery

Age-related sex differences in intensive care treatment and outcomes: a nationwide cohort study

Br J AnaesthPublished Retrospective cohort study

Main finding · 30-day mortalityResult — go to the resultOdds ratio 1.03 CI 1.01–1.05

Authors' conclusion

Although males constitute a larger proportion of ICU patients and receive more advanced treatments, females have higher adjusted mortality.

Study context

Population
Adult (≥18 yr) ICU patients, Swedish Intensive Care Registry, 2012–202442.8% female
Participants
303,875 participants
Exposure
Female vs male ICU patients
Outcome
30-day mortality
Follow-up
30 days
Methodological detailsnationwide registry, multivariable logistic regression, natural cubic splines (age–sex interaction)
  • Nationwide registry
  • Multivariable logistic regression
  • Natural cubic splines (age–sex interaction)

Main finding

As reported in the abstract

Odds ratio

1.03

CI 1.01–1.05

Female vs Male
OR 1.03 (CI 1.01–1.05)

Observational data: associations, not effects.

Further findings

OutcomeOR (CI)
Crude mortalityCrude mortality higher in male patients0.94 (0.92–0.95)

Continuous RRT and invasive ventilation

Male patients more likely to receive continuous RRT and invasive ventilation

Mortality by age (age–sex interaction)

Female patients had lower mortality risk at younger ages and higher mortality risk at older ages

Original publication

Age-related sex differences in intensive care treatment and outcomes: a nationwide cohort study. Br J Anaesth. Published 29 August 2025. doi:10.1016/j.bja.2025.07.044

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