Table 3.

Multivariable regression for survival to hospital discharge.

Variable	Odds Ratio (95% CI)	P-value
Year of OHCA (integer)	1.11 (0.91, 1.33)	0.29
Age group		0.25
Perinatal	1.51 (0.50, 4.54)	0.46
Infant	0.35 (0.17, 0.72)	0.005
Child	Referent
Adolescent	0.74 (0.38, 1.42)	0.36
Male	0.73 (0.44, 1.21)	0.22
Witnessed	3.92 (2.31, 6.65)	<0.001
Bystander CPR	1.33 (0.80, 2.19)	0.12
EMS arrival <8 minutes	0.76 (0.35, 1.66)	0.50
ALS first on-scene	0.83 (0.41, 1.69)	0.61
Advanced airway attempted	0.64 (0.37, 1.13)	0.12
Initial rhythm		<0.001
VF/VT	32.48 (14.86, 71.00)	<0.001
PEA	5.21 (2.53, 10.72)	<0.001
Asystole	Referent	<0.001
Other/unknown	7.76 (3.80, 15.87)	<0.001
Region		<0.001
1	0.26 (0.04, 1.84)	0.17
2	Referent
3	0.51 (0.14, 1.83)	0.30
4	1.08 (0.42, 2.77)	0.87
5	5.37 (1.64, 17.61)	0.01
6	1.12 (0.35, 3.55)	0.85
7	2.08 (0.70, 6.13)	0.19
8	0.50 (0.18, 1.40)	0.19
9	1.90 (0.64, 5.61)	0.24