Table 2.

Univariate and Multivariable Cox Regression Analyses of Association to ROSC

	Univariate				Multivariable
Variable	N	OR	95% CI	P value	OR	95% CI	P value
Audiovisual feedback	325	0.61	0.38–0.95	0.03	0.53	0.29–0.97	0.04
Age, y	325	0.97	0.96–0.99	<0.001	0.98	0.96–0.99	0.009
Sex, male	325	2.76	1.64–4.79	<0.001	1.55	0.78–3.15	0.2
Primary AED rhythm, shockable	293	9.02	5.33–15.6	<0.001	8.11	4.50–15.1	<0.001
Place of arrest, public	325	4.98	3.08–8.23	<0.001	3.38	1.82–6.37	<0.001
EMS response time, min	317	0.96	0.89–1.03	0.3	1.01	0.92–1.10	0.9

The multivariable model was adjusted for all variables included in the table.

AED indicates automated external defibrillator; EMS, emergency medical services; OR, odds ratio, and ROSC, return of spontaneous circulation.