Table 3.

The Cox proportional hazards model for 180-day mortality

Factor	Hazard ratio	95% CI	P value
Sex (female)	0.89	0.6–1.3	0.55
Age (per year)	1.02	1.01–1.03	0.008
Initial rhythm (PEA/Asystole)	2.19	1.59–3.0	< 0.001
Prehospital ROSC (yes)	0.10	0.06–0.16	< 0.001
Collapse to EMS arrival (per minute)	1.02	0.99–1.05	0.22
CPR time (per minute)	1.01	1.01–1.02	< 0.001
Place of cardiac arrest (public)	1.01	0.72–1.42	0.95
Successful PCI (yes)	0.77	0.52–1.12	0.18
ECPR (yes)	0.21	0.14–0.31	< 0.001

Highlighted in bold are the values which are statistically significant (less than 0.05)

CPR cardiopulmonary resuscitation, CI confidence interval, ECPR extracorporeal cardiopulmonary resuscitation, EMS emergency medical service, ROSC return of spontaneous circulation, PCI percutaneous coronary intervention, PEA pulseless electrical activity