Table 4. Survival factors for hospitalized OHCA patients.

Variables	Group comparison	aORa	95% CI	P value
Age		0.98	0.98–0.99	<0.001
Number of failing organs		0.75	0.71–0.80	<0.001
CAD	Yes vs. no	1.49	1.33–1.68	<0.001
Valvular heart disease	Yes vs. no	1.48	1.12–1.97	0.006
Cardiomyopathy	Yes vs. no	1.55	1.12–2.14	0.008
Atrial flutter/fibrillation	Yes vs. no	1.50	1.18–1.89	0.001
Malignancy	Yes vs. no	0.58	0.47–0.72	<0.001
Level of hospital	Regional vs. medical center	0.76	0.67–0.87	<0.001
	Local vs. medical center	0.88	0.73–1.07	0.222
ICU bed size	2nd vs. 1st quartile	1.33	1.15–1.54	<0.001
	3rd vs. 1st quartile	1.59	1.35–1.87	<0.001
	4th vs. 1st quartile	1.56	1.31–1.86	<0.001
Cardiac rhythm on admission	VF vs. non-VF	3.51	3.06–4.01	<0.001
Transfer to another hospital	Yes vs. no	1.59	1.30–1.93	<0.001
Length of hospital stay		1.01	1.01–1.02	<0.001

^aVariables selected for the model: age, number of failing organs, hypertension, CAD, valvular heart disease, cardiomyopathy, atrial flutter/fibrillation, malignancy, hospital level, geographic area, teaching hospital status, bed size, ICU bed size, cardiac rhythm on admission, transfer to another hospital, length of hospital stay.

OHCA: out-of-hospital cardiac arrest; aOR: adjusted odds ratio; CI: confidence interval; CAD: coronary artery disease; ICU: intensive care unit; VF: ventricular fibrillation.