Table 1. Patients’ characteristics.

Characteristics	Non-survivors (n=41)	Survivors (n=11)	P value
Age (years)	69.11 ± 3.43	63.01 ± 2.77	0.03*
Sex (males %)	23 (56.09)	7 (63.63)	0.49
CPR duration (min)	22.12 ± 3.22	19.32 ± 3.64	0.08
Etiology			0.01*
Cardiac	10	9
Non cardiac	31	2
Initial rhythm
Asystole	31 (75.6)	7 (63.6)	0.12
VF	7 (17)	3 (27.2)	0.1
PEA	2 (4.8)	1 (9)	0.08
VT	0 (0)	1 (9)	0.22
DC shock	12	4	0.15
Vasopressor infusion	24 (58.5)	4 (36.3)	0.01*

Abbreviations: CPR, cardiopulmonary resuscitation; Vf, ventricular fibrillation; PEA, pulseless electrical activity; VT, ventricular tachycardia.

Quantitative and qualitative variables were presented as mean ± SD and number (percent), respectively. Significance level was considered as 0.05.