Acute cardiac care & resuscitationCohort study
Prognostic impact of bystander-patient relationship and age in patients with out-of-hospital cardiac arrest
- Registry study
- All-Japan Utstein Registry
- 2005–2023
Authors' conclusion
Patients with OHCA witnessed by family members had worse neurological outcomes than those witnessed by friends, colleagues, and passersby. This association differed by patient age, with family-member-witnessed OHCA associated with more favorable outcomes in younger patients but poorer outcomes in the elderly.
Study context
- Population
- Adults with witnessed OHCApatients included
- Participants
- 554,923 adults
- Exposure
- Bystander-patient relationship, by age category
- family membersn = 459,841
- friends and colleaguesn = 55,112
- passersbyn = 39,970
- Outcome
- Neurologically favorable survival
- Follow-up
- 1 month
Main finding
As reported in the abstract
Observational data: associations, not effects.
Further findings
Proportion witnessed by family members with advancing age
- increased with advancing age
- P < 0.001
Neurological outcomes, multivariable analysis
- OHCA witnessed by family members associated with poorer neurological outcomes
- Among younger patients (aged 20-40 years), OHCA witnessed by family members related to better neurological outcomes
Original publication
Prognostic impact of bystander-patient relationship and age in patients with out-of-hospital cardiac arrest. Resuscitation. Published 25 September 2026. doi:10.1016/j.resuscitation.2026.111330
Summarised from the published abstract; every number is checked against it