Table 2.

Odds ratios of key factors associated with survival

	Survival to hospital admission			Survival to hospital discharge			1 year survival
	OR	95% CI	p	OR	95% CI	p	OR	95% CI	p
Urban vs. rural	1.84	1.43– 2.36	< 0.001	1.51	1.08– 2.11	0.017	1.58	1.11– 2.26	0.012
EMS response time ≥ 10 min vs < 10 min	0.69	0.55– 0.87	0.002	0.61	0.45– 0.83	0.002	0.57	0.41– 0.79	< 0.001
Age (one additional year)	0.97	0.97 –0.98	< 0.001	0.96	0.95– 0.97	< 0.001	0.96	0.95– 0.97	< 0.001
Gender, male vs. female	1.94	1.51 –2.51	< 0.001	3.15	2.10– 4.72	< 0.001	3.02	1.98– 4.61	< 0.001
EMS physician attendance vs. no EMS-physician attendance	2.63	1.86 –3.74	< 0.001	1.37	0.87– 2.16	0.17	1.39	0.86– 2.24	0.18
Witnessed arrest vs. non-witnessed arrest	4.12	3.12– 5.44	< 0.001	7.23	4.20–12.43	< 0.001	6.63	3.78–11.61	< 0.001
OHCA location in public vs. home	1.20	1.10– 1.30	< 0.001	1.31	1.20– 1.43	< 0.001	1.27	1.16– 1.39	< 0.001
Bystander CPR vs. no bystander CPR	1.98	1.52– 2.58	< 0.001	3.05	2.00– 4.65	< 0.001	2.84	1.83– 4.39	< 0.001
Shockable vs. non-shockable rhythm	8.25	6.21– 10.95	< 0.001	25.74	15.71–42.18	< 0.001	39.52	21.14–73.87	< 0.001
Cardiac vs. medical cause for cardiac arrest	1.31	0.92– 1.88	0.14	0.34	0.18–0.63	< 0.001	0.16	0.07– 0.40	< 0.001

Odds ratios (OR) in univariable analysis of key factors associated with survival to hospital admission, survival to hospital discharge and 1 year survival in out-of-hospital cardiac arrest (OHCA) (n = 1138). CI confidence interval, CPR cardiopulmonary resuscitation, EMS emergency medical services, OR odds ratio