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Table 1 The clinical and prehospital characteristics of the enrollees

From: Predictive performances of ALS and BLS termination of resuscitation rules in out-of-hospital cardiac arrest for different resuscitation protocols

Characteristics The Group of 2015 (N=1260) The Group of 2020 (N=979) P value
Age (year), mean ± SD 68.5±16.6 67.7±15.9 0.280
Female sex, n (%) 477(37.9) 350(35.8) 0.327
Location of cardiac arrest, n    
    Home 1035(82.1) 742(75.8) <0.001
    Public space 166(13.2) 187(19.1) 0.080
    Other 59(4.7) 50(5.1) 0.718
EMS care interval, min    
    Response time 6.7±3.3 7.2±2.8 <0.001
    Scene time 10.7±6.4 13.5±4.7 <0.001
    Transport time 7.4±5.4 7.8±5.1 0.06
Initial rhythm    
    VF/VT 114(9.0) 95(9.7) 0.597
    PEA 256(20.3) 198(20.2) 0.956
    Asystole 672(53.3) 511(52.2) 0.590
    Other or unknown 33(2.6) 42(4.3) 0.029
    Not recorded 185(14.7) 133(13.6) 0.462
Advanced airway by EMS    
    Laryngeal mask airway 1040(82.5) 709(72.4) <0.001
    Endotracheal intubation 2(0.2) 22(2.2) <0.001
Epinephrine use by EMS 60(4.8) 180(18.4) <0.001
Cardiac arrest witnessed by    
    Bystander 691(54.8) 374(38.2) <0.001
    EMS/first responder 70(5.6) 68(6.9) 0.175
Defibrillation before transport 124(9.8) 150(15.3) <0.001
Bystander CPR 356(28.3) 477(48.7) lt;0.001
  1. SD standard deviation, EMS emergency medical service, VF ventricular fibrillation, VT ventricular tachycardia, PEA pulseless electrical activity, CPR cardiopulmonary resuscitation
  2. Definition: response time, from emergency calls to ambulance arrival at the scene; scene time, between ambulance arrival and departure from the scene; transport time, from scene departure to hospital arrival