Association between prehospital prognostic factors on out-of-hospital cardiac arrest in different age groups

BMC Emergency Medicine

Table 1 Demographic factors and outcomes among different age groups of out-of-hospital cardiac arrest patients

	Group 1 (Age ≦75 years)	Group 2 (Age > 75 years)	p
Characteristics of medical out-of-hospital cardiac arrest patients	n = 2529	n = 1659
Age (years)	58.1 ± 12.2	84.0 ± 5.4	< 0.001
Male sex	1822	890	< 0.001
EMS response time (min)	7.1 ± 3.7	6.6 ± 3.1	< 0.001
Cardiac arrest location (public)	653	149	< 0.001
Bystander CPR	1069	699	0.931
Bystander keep airway	229	172	0.158
Attended by EMS-Paramedic	760	456	0.074
Prehospital ROSC	46	31	0.014
Shockable rhythm	171	32	< 0.001
Defibrillation by AED	643	171	< 0.001
Hypertension	773	741	< 0.001
Diabetes	589	470	< 0.001
Old stroke	153	171	< 0.001
Liver disease	99	42	0.015
Respiratory disease	73	117	< 0.001
Renal disease	240	149	0.579
Survival over 2 h	803	432	< 0.001
Survival over 24 h	648	326	< 0.001
Survival to hospital discharge	328	108	< 0.001
Favorable neurologic outcome	136	23	< 0.001

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