Skip to main content

Table 1 Baseline characteristics of the patients with out-of-hospital cardiac arrest (OHCA) who received a biphasic defibrillation shock before hospital arrival (n = 20,851)

From: The number of prehospital defibrillation shocks and 1-month survival in patients with out-of-hospital cardiac arrest

Variables  
(OHCA patients)  
Age (yr) (mean ± standard deviation [SD]) 65.73 ± 15.28
Sex (male), no. (%) 16368 (78.50)
Origin of OHCA (cardiac origin), no. (%) 18598 (89.19)
Relationship between bystander and patient (family member), no. (%) 11194 (53.69)
(CPR initiated by bystander)  
Chest compressions (yes), no. (%) 9681 (46.43)
Rescue breathing (yes), no. (%) 2228 (10.69)
(Life support by EMS personnel)  
Emergency life-saving technician in ambulance (yes), no. (%) 20284 (97.28)
Advanced life support by MD (yes), no. (%) 2648 (12.70)
Time from call to arrival at scene (min) (mean ± SD) 7.09 ± 3.25
Time from call to arrival at hospital (min) (mean ± SD) 33.68 ± 15.50
Use of ALS devices (laryngeal mask/an adjunct airway/ tracheal tubes), no. (%) 8440 (40.48)
Epinephrine use (yes), no. (%) 4644 (22.27)
Time from the first defibrillation to the first ROSC before hospital arrival (min) (mean ± SD) 7.67 ± 9.59
Number of defibrillations by EMS personnel (mean ± SD) 2.36 ± 1.67
Proportions of the number of defibrillations (%)  
1 8403 (40.30)
≥2 12448 (59.70)
Frequency of patients who took ≤1 min. from the first defibrillation to the first ROSC before hospital arrival (%) 2743 (13.16)
(Endpoint)  
1-month survival after cardiac arrest (yes), no. (%) 6480 (31.08)
ROSC (yes), no. (%) 6876 (32.98)