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Table 1 Characteristics of all patients and each group

From: Out-of-hospital cardiac arrest patients with an initial non-shockable rhythm could be candidates for extracorporeal cardiopulmonary resuscitation: a retrospective study

  All patients Non-shockable rhythm Shockable rhythm p-value
  n = 186 n = 62 n = 124  
Age, median (IQR) 59 (48, 65) 60 (49, 66) 58 (46, 65) 0.24
Sex, male, n (%) 158 (85) 46 (74) 112 (90) < 0.01
Witness, n (%) 169 (91) 59 (95) 110 (89) 0.19
Bystander CPR, n (%) 119 (64) 51 (82) 68 (55) < 0.01
Cardiac arrest after EMS personnel arrival, n (%) 55 (30) 41 (66) 14 (11) < 0.01
Low flow time, median (IQR) 41 (33, 48) 40 (31, 51) 41 (34, 48) 0.84
Transient ROSC, n (%) 36 (19) 12 (19) 24 (19) 1
Etiology, n (%)     0.06
Acute coronary syndrome 77 (41) 22 (36) 55 (44)  
Vasospastic angina 5 (3) 2 (3) 3 (2)  
Idiopathic ventricular fibrillation 42 (23) 1 (2) 41 (33)  
Cardiomyopathy 16 (9) 4 (6) 12 (10)  
Pulmonary embolism 10 (5) 9 (15) 1 (1)  
Accidental hypothermia 3 (2) 2 (3) 1 (1)  
Aortic dissection 11 (6) 6 (10) 5 (4)  
Respiratory failure 7 (4) 7 (11) 0  
Others 15 (8) 9 (15) 6 (5)  
Coronary angiography 137 (74) 31 (50) 106 (86) < 0.01
  1. CPR cardiopulmonary resuscitation, EMS emergency medical service, IQR interquartile range, ROSC return of spontaneous circulation