Cardiac arrest & resuscitation
The effect of recognition on survival after out-of-hospital cardiac arrest and implications for biosensor technologies
Authors' conclusion
Unwitnessed OHCA account for the majority of OHCAs, yet survival is dismal.
Study context
- Population
- Emergency Medical Services (EMS)-assessed out-of-hospital cardiac arrest (OHCA), British Columbia Cardiac Arrest Registry (2019–2020), excluding EMS-witnessed, terminal illness or do-not-resuscitate6,314 EMS-treated, 5098 EMS-untreated
- Participants
- 11,412 participants
- Exposure
- Unwitnessed vs bystander-witnessed OHCA
- Unwitnessedn = 8,879reference
- Bystander-witnessedn = 2,533
- Outcome
- Survival to hospital discharge
Methodological detailsregistry-based, mediation analysis, bootstrap logistic regression modelling
- Registry-based
- Mediation analysis
- Bootstrap logistic regression modelling
Main finding
As reported in the abstract
- Proportion of bystander-witness benefit attributable to recognition
- 84% (95% CI: 72, 86)
Observational data: associations, not effects.
Further findings
Modelled additional survivors among previously unwitnessed cases
- If all bystander witnessed
- 1198
- If recognized without interventions
- 912
Original publication
The effect of recognition on survival after out-of-hospital cardiac arrest and implications for biosensor technologies. Resuscitation. Published 13 July 2023. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →