Acute cardiac care & resuscitation
Impact of dispatcher-assisted cardiopulmonary resuscitation policy on outcomes following out-of-hospital cardiac arrest: an interrupted time series analysis
Authors' conclusion
DA-CPR implementation substantially improved OHCA outcomes in Shanghai
Study context
- Population
- Out-of-hospital Cardiac Arrest (OHCA) cases reported by the Shanghai Medical Emergency Center, January 2019 to July 2024
- Participants
- 75,628 OHCA cases
- Comparison
- After vs before dispatcher-assisted Cardiopulmonary Resuscitation (DA-CPR) policy implementation
- Outcome
- OHCA outcomes: bystander CPR, ROSC, 30-day survival
Methodological detailscounterfactual analysis, modified autoregressive integrated moving average (ARIMA) model, joinpoint regression adjusting for COVID-19
- Counterfactual analysis
- Modified ARIMA model
- Joinpoint regression adjusting for COVID-19
Main finding
As reported in the abstract
Post-policy level change
Post-policy vs Pre-policyLevel increase, percentage point (95% CI)P value
Bystander CPR
3.553(1.227–5.879)
P < 0.05ROSC
2.215(1.052–3.380)
P < 0.00130-day survival
0.461(0.025–0.898)
P < 0.05Further findings
Annual OHCA incidence
- Crude incidence per 100,000 population
- 144 to 287
- Age-standardized rate
- 60 to 105
Average outcome rates over the study period
- Bystander CPR
- 4.643%
- Bystander CPR, age-standardized
- 10.554%
- ROSC
- 2.914%
- ROSC, age-standardized
- 4.799%
- 30-day survival
- 0.376%
- 30-day survival, age-standardized
- 1.379%
- Median age 85
Original publication
Impact of dispatcher-assisted cardiopulmonary resuscitation policy on outcomes following out-of-hospital cardiac arrest: an interrupted time series analysis. Resuscitation. Published 12 September 2025. doi:10.
Summarised from the published abstract; every number is checked against it