Perioperative medicine & outcomes

Impact of clinical frailty on mortality after elective surgery in patients aged ≥ 90 years admitted to critical care: a binational intensive care registry analysis

AnaesthesiaPublished retrospective cohort study

Main finding · 1-year all-cause mortalityResult — go to the resultMatched HR 1.66 95% CI 1.47–1.87

Authors' conclusion

Among patients aged ≥ 90 years undergoing elective surgery with postoperative intensive care admission, frailty is strongly associated with prolonged recovery and worse short and long-term outcomes. Incorporation of frailty assessment into peri-operative pathways may improve risk stratification, shared decision-making and personalised care for patients aged ≥ 90 years.

Study context

Population
Patients aged ≥ 90 years admitted to ICU following elective surgery, encompassing planned and unplanned ICU admissionsmatched cohort · without frailty (Clinical Frailty Scale 1-4) 2,699 · living with frailty (Clinical Frailty Scale 5-8) 2,699
Participants
5,398 patients
Exposure
Frail vs non-frail patients
  • Frailn = 2,699
  • Non-frailn = 2,699
Outcome
1-year all-cause mortality
Follow-up
1 year
Methodological detailspropensity score matching, binational intensive care registry (Australian and New Zealand Intensive Care Society Adult Patient Database)
  • Propensity score matching
  • Binational intensive care registry (Australian and New Zealand Intensive Care Society Adult Patient Database)

Main finding

As reported in the abstract

Matched HR

1.66

95% CI 1.47–1.87

P < 0.001

Frail vs Non-frail
matched HR 1.66 (95% CI 1.47–1.87); P < 0.001

Observational data: associations, not effects.

Secondary outcomes

OutcomeEstimateP value
In-hospital mortalityHigher in-hospital mortality with frailtymatched HR 1.66 (95% CI 1.22–2.27)P = 0.001
Return to pre-admission residence at hospital dischargeHigher odds without frailtymatched OR for returning to pre-admission residence 1.45 (95% CI 1.29–1.62)P < 0.001

ICU mortality

Mortality in ICU was low and not significantly different between patients who were frail and non-frail

Duration of hospital stay

Patients who were frail experienced longer hospital stays

Original publication

Impact of clinical frailty on mortality after elective surgery in patients aged ≥ 90 years admitted to critical care: a binational intensive care registry analysis. Anaesthesia. Published 13 October 2026. doi:10.1111/anae.70435

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