Acute cardiac care & resuscitation
The association between emergency medical service personnel’s out-of-hospital cardiac arrest case volume and patient outcomes: a cohort study
Main finding · 30-day survival, per increase in annual OHCA case volumeResult — go to the resultAdjusted relative risk 1.000 95% CI 0.995–1.004Authors' conclusion
EMS personnel's OHCA case volume in the preceding year was not associated with an improved 30-day survival.
Study context
- Population
- Adult out-of-hospital cardiac arrest (OHCA) patients in Denmark from 2016 to 2023, where attending emergency medical service (EMS) personnel could be identifiedOHCA cases with complete data, attended by 3,449 EMS personnel
- Participants
- 16,931 patients
- Exposure
- The number of OHCA cases attended in the preceding year by EMS personnel in the first arriving EMS unit
- Outcome
- 30-day survival, per increase in annual OHCA case volume
- Follow-up
- 30 days
Main finding
As reported in the abstract
Adjusted relative risk
1.000
95% CI 0.995–1.004
Increasing annual OHCA case volume
aRR 1.000 (95% CI 0.995–1.004)
Per increase in annual OHCA case volume, as printed
Observational data: associations, not effects.
Further findings
| Outcome | aRR (95% CI) | |
|---|---|---|
| Any return of spontaneous circulation, per increase in annual OHCA case volumeNot associated | 1.001 (0.998–1.003) | |
| 0.512Adjusted relative risk (log scale) |
Annual OHCA exposure per EMS personnel in the first arriving unit
- Median (Q1;Q3)
- 5 (3;8) cases
Original publication
The association between emergency medical service personnel’s out-of-hospital cardiac arrest case volume and patient outcomes: a cohort study. Resuscitation. Published 5 March 2026. doi:10.
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