Table 3.

Factors associated with favorable neurological outcome after prolonged CPR duration

	Total	Cases (%)	Adjusted OR	(95% CI)
CPR duration (continuous variable)			0.92	(0.88–0.95)
Age (per one year increment)			0.96	(0.94–0.98)
Sex
Men	11,494	24 (0.2)	0.73	(0.37–1.48)
Women	8060	14 (0.2)	Reference
Cause
Cardiac etiology	11,108	23 (0.2)	0.86	(0.41–1.80)
Non-cardiac etiology	8446	15 (0.2)	Reference
Bystander witness
No	11,985	6 (0.1)	Reference
Yes	7569	32 (0.4)	7.66	(3.04–19.30)
Bystander CPR
No	10,569	28 (0.3)	Reference
Yes	8985	10 (0.1)	0.48	(0.23–1.02)
EMS response time (continuous variable)			1.04	(0.97–1.12)
First documented rhythm at the scene
Non-shockable	18,104	18 (0.1)	Reference
Shockable	944	16 (1.7)	14.70	(6.62–32.62)
Other	506	4 (0.8)	2.81	(0.89–8.84)
Adrenaline
No	14,016	33 (0.2)	Reference
Yes	5538	5 (0.1)	0.36	(0.14–0.94)
Advanced airway management
No	1689	4 (0.2)	Reference
Yes	17,865	34 (0.2)	0.78	(0.27–2.28)

CPR, cardiopulmonary resuscitation; OR, odds ratio; CI, confidence interval