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Table 1 Clinical and prehospital characteristics of out-of-hospital cardiac arrest patients by group

From: Applying the termination of resuscitation rules to out-of-hospital cardiac arrests of both cardiac and non-cardiac etiologies: a prospective cohort study

Characteristic Total (n = 11,505) Cardiac etiology (n = 6138) Noncardiac etiology (n = 5367)
Age (years) 72.4 ± 15.8 73.4 ± 14.5 71.2 ± 17.1
Male 6884 (59.8) 3827 (62.3) 3057 (57.0)
Location of arrest  
   Home 8395 (73.0) 4365 (71.1) 4030 (75.1)
   Public space (indoor) 352 (3.1) 217 (3.5) 135 (2.5)
   Public space (outdoor) 622 (5.4) 435 (7.1) 187 (3.5)
   Other 2136 (18.6) 1121 (18.3) 1015 (18.9)
EMS care interval (minutes)  
   Call to arrival of ambulance at scene 8.0 ± 3.6 8.0 ± 3.7 7.9 ± 3.6
   Call to hospital arrival 35.3 ± 3.6 35.4 ± 11.0 35.3 ± 12.0
Initial rhythm  
   Ventricular fibrillation/ventricular tachycardia 845 (7.3) 752 (12.3) 93 (1.7)
   Pulseless electrical activity 2369 (20.6) 1111 (18.1) 1258 (23.4)
   Asystole 7550 (65.6) 3909 (63.7) 3641 (67.8)
   Others or unknown 741 (6.4) 366 (6.0) 375 (7.0)
Advanced airway procedure 5368 (46.7) 2941 (47.9) 2427 (45.2)
Prehospital adrenaline administration 2287 (19.9) 1220 (19.9) 1067 (19.9)
BLS performed by EMS 5424 (47.1) 2818 (46.9) 2606 (48.6)
   Met BLS TOR criteria 4193 2060 2133
ALS performed by EMS 6081 (52.9) 3320 (54.1) 2761 (51.4)
   Met ALS TOR criteria 1701 956 745
Arrest witnessed by  
   Bystander 5473 (47.6) 2881 (46.9) 2592 (48.3)
   EMS/first responder 929 (8.1) 480 (7.8) 449 (8.4)
Prehospital defibrillation (layperson and EMS) 1565 (13.6) 1249 (20.3) 316 (5.9)
Bystander-initiated CPR 4231 (36.8) 2226 (36.3) 2005 (37.4)
Prehospital ROSC 1070 (9.3) 570 (9.3) 500 (9.3)
  1. Data presented as means ± standard deviations for continuous variables and numbers (percentage) for categorical values
  2. ALS advanced life support, BLS basic life support, CPR cardiopulmonary resuscitation, EMS emergency medical service, ROSC return of spontaneous circulation, TOR termination of resuscitation