Table 4.

Logistic regressions for 1-month survival rates and neurologically favorable 1-month survival rates

	1-month survival					Neurologically favorable 1-month survival
	OR	95%CI			p	OR	95%CI			p
Sex
Male	1.00					1.00
Female	0.95	0.90	-	1.00	0.040	0.87	0.80	-	0.93	<0.001
Age (yrs)
≤59	1.00					1.00
60 - 69	0.83	0.72	-	0.96	0.011	0.65	0.54	-	0.80	<0.001
70 - 79	0.57	0.49	-	0.65	<0.001	0.32	0.26	-	0.40	<0.001
80 - 89	0.37	0.32	-	0.43	<0.001	0.23	0.18	-	0.29	<0.001
≥90	0.27	0.21	-	0.34	<0.001	0.15	0.10	-	0.22	<0.001
Cause of arrest
Cardiac	1.00					1.00
Non-cardiac	0.81	0.78	-	0.85	<0.001	0.49	0.45	-	0.53	<0.001
First aid by bystander
None	1.00					1.00
CPR without AED use	1.52	1.45	-	1.60	<0.001	1.99	1.85	-	2.13	<0.001
CPR with AED use	5.73	4.80	-	6.84	<0.001	9.60	7.89	-	11.7	<0.001
Seasons
Summer (June-August)	1.00					1.00
Autumn (September-November)	0.95	0.88	-	1.01	0.103	0.94	0.86	-	1.04	0.224
Winter (December-February)	0.84	0.78	-	0.89	<0.001	0.81	0.74	-	0.90	<0.001
Spring (March-May)	0.85	0.80	-	0.91	<0.001	0.80	0.73	-	0.88	<0.001
Population density (/km2)
Very low (<250)	1.00					1.00
Low (250-999)	1.14	0.99	-	1.30	0.067	1.03	0.85	-	1.25	0.776
Middle-low (1,000-2,999)	1.34	1.18	-	1.53	<0.001	1.29	1.08	-	1.55	0.006
Middle-high (3,000-5,999)	1.53	1.35	-	1.74	<0.001	1.29	1.08	-	1.55	0.006
High (6,000-9,999)	1.63	1.42	-	1.85	<0.001	1.39	1.15	-	1.67	0.001
Very high (≥10,000)	1.64	1.44	-	1.87	<0.001	1.47	1.22	-	1.77	<0.001
The proportion of neighborhood elderly people (aged ≥65 yrs; %)
<15	1.00					1.00
15 - 25	0.89	0.80	-	0.98	0.025	0.94	0.82	-	1.08	0.384
>25	0.82	0.72	-	0.94	0.005	0.81	0.68	-	0.96	0.017

CPR: cardiopulmonary resuscitation, AED: automated external defibrillators, OR: odds ratio, CI: confidence interval