Cardiac arrest & resuscitation

Bystander interventions and survival after out-of-hospital cardiac arrest according to neighborhood ethnicity

ResuscitationPublished Retrospective cohort study

Authors' conclusion

Individuals who experienced OHCA in predominantly non-Western neighborhoods received less bystander CPR and defibrillation compared to Danish neighborhoods.

Study context

Population
Out-of-hospital Cardiac Arrest (OHCAs) in Denmark 2016–2021, Danish Cardiac Arrest Registry
Participants
12,750 OHCAs
Exposure
Non-Western and mixed population vs Danish neighborhoods
  • Non-Westernn = 483
  • Danishn = 12,100reference
  • Mixed populationn = 167
Outcome
Bystander cardiopulmonary resuscitation (CPR) and defibrillation
Methodological detailsnationwide registry, geocoded, logistic regression adjusted for sex, age and area-level household income
  • Nationwide registry
  • Geocoded
  • Logistic regression adjusted for sex, age and area-level household income

Main finding

As reported in the abstract

Bystander CPR
Each group vs danishOdds ratio (95% CI)
Non-Westernadjusted
0.71(0.58–0.87)
Mixed population
0.64(0.42–1.23)

Observational data: associations, not effects.

Further findings

OutcomeOR (95% CI)
Bystander defibrillationNon-Western vs Danish · adjusted0.64 (0.42–0.97)
Bystander defibrillationMixed population vs Danish1.17 (0.68–2.00)

OHCA incidence

Original publication

Bystander interventions and survival after out-of-hospital cardiac arrest according to neighborhood ethnicity. Resuscitation. Published 6 February 2026. doi:10.1016/j.resuscitation.2026.111008

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