Table 2.

Result of Logistic Regression Analysis of Survival to Discharge and Good Neurological Outcome at Discharge by EMS Parameter According to Initial Rhythms After PSM

Variables	Survival to Discharge				Good Neurological Outcome
	OR (95% CI)	P Value	aOR (95% CI)	P Value	OR (95% CI)	P Value	aOR (95% CI)	P Value
Nonshockable rhythm after PSM (N=4215)
Response time	0.92 (0.86–0.98)	0.003a	0.92 (0.87–0.97)	0.003a	0.83 (0.76–0.92)	<0.001a	0.84 (0.76–0.93)	0.001a
Scene time interval	0.99 (0.96–1.03)	0.63	0.99 (0.96–1.02)	0.56	0.97 (0.91–1.02)	0.20	0.96 (0.91–1.02)	0.16
Transport time
To non‐CAC <8 min	Reference group		Reference group		Reference group		Reference group
To non‐CAC ≥8 min	0.93 (0.53–1.62)	0.79	0.96 (0.55–1.67)	0.88	0.81 (0.36–1.84)	0.62	0.83 (0.36–1.89)	0.65
To CAC <8 min	1.38 (0.98–1.94)	0.06	1.41 (1.01–1.99)	<0.05a	1.02 (0.61–1.69)	0.95	1.07 (0.64–1.78)	0.81
To CAC ≥8 min	1.14 (0.74–1.76)	0.56	1.19 (0.77–1.85)	0.44	0.51 (0.22–1.15)	0.10	0.53 (0.23–1.20)	0.13
Shockable rhythm after PSM (N=941)
Response time	0.92 (0.86–0.98)	0.02a	0.92 (0.86–0.99)	0.03a	0.94 (0.86–1.02)	0.11	0.93 (0.85–1.01)	0.10
Scene time interval	1.01 (0.97–1.05)	0.78	0.99 (0.95–1.04)	0.80	0.99 (0.94–1.04)	0.74	0.98 (0.93–1.03)	0.46
Transport time
To non‐CAC <8 min	Reference group		Reference group		Reference group		Reference group
To non‐CAC ≥8 min	0.40 (0.12–1.32)	0.13	0.45 (0.13–1.49)	0.19	0.28 (0.03–2.32)	0.34	0.54 (0.12–2.35)	0.41
To CAC <8 min	1.92 (1.26–2.94)	0.002a	1.95 (1.11–3.41)	0.02a	2.50 (1.31–4.80)	0.006a	2.70 (1.40–5.22)	0.003a
To CAC ≥8 min	1.78 (1.03–3.10)	0.04a	1.92 (1.25–2.94)	0.003a	2.18 (1.28–3.71)	0.004a	2.20 (1.29–3.75)	0.004a

aOR indicates adjusted OR; CAC, cardiac arrest center; EMS, emergency medical service; OR, odds ratio; and PSM, propensity score matching.

^a P<0.05.