Cardiac arrest & resuscitation

Impact of frailty on mortality, functional outcome, and health status after out-of-hospital cardiac arrest: insights from the TTM2-trial

Intensive Care MedPublished Secondary analysis of the TTM2 randomised trial

Authors' conclusion

Frailty was associated with a significantly increased risk of mortality and poor functional outcome after out-of-hospital cardiac arrest. Findings suggest more frequent functional decline and lower overall health status in frail survivors.

Study context

Population
Participants after OHCA in the TTM2 trial188 (10%) frail or severely frail
Participants
1,861 participants
Comparison
Prefrail, frail and severely frail vs fit
  • Prefrailn = 240
Primary endpoint
Mortality and poor functional outcome (modified Rankin Scale 4-6)
Follow-up
6 and 24 months
Methodological detailscohort-based, international, prospective, multicentre
  • Cohort-based
  • International
  • Prospective
  • Multicentre

Primary result

As reported in the abstract

6 month mortality · 6 months
Each group vs fitAdjusted odds ratio (95% CI)
Prefrail
2.7(1.8–3.8)
Frail
3.7(1.9–7.1)
Severely frail
8.9(4.2–18.7)

Further findings

OutcomeaOR (95% CI)
Poor functional outcome · 6 monthsPrefrail vs Fit2.9 (1.9–4.2)
Poor functional outcome · 6 monthsFrail vs Fit3.9 (1.9–8.1)
Poor functional outcome · 6 monthsSeverely frail vs Fit35.4 (8.4–148.8)

Neuroprognostication and withdrawal-of-life-sustaining-therapies (WLST)

Severely frail underwent neuroprognostication less often
P < 0.001
WLST more common in prefrail, frail and severely frail
P < 0.001

Functional decline and health status in survivors

Prefrail and frail survivors tended to report more frequent functional decline and lower health status, with individual variation

Original publication

Impact of frailty on mortality, functional outcome, and health status after out-of-hospital cardiac arrest: insights from the TTM2-trial. Intensive Care Med. Published 10 November 2025. doi:10.1007/s00134-025-08185-5

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