Skip to main content

Table 1 Baseline characteristics of 45,067 cases of OHCA

From: Identifying the relative importance of predictors of survival in out of hospital cardiac arrest: a machine learning study

 Overall
(n = 45,067)
Age – n (%)
 Mean (SD)68.3 (17.6)
 Missing1631 (3.6%)
Sex – n (%)
 Men30,146 (66.9%)
 Women14,915 (33.1%)
 Missing6 (0.0%)
Initial rhythm – n (%)
 Asystole23,984 (53.2%)
 PEA6844 (15.2%)
 VF/VT9800 (21.7%)
 Missing4439 (9.8%)
Defibrillated before ambulance arrival – n (%)
 Defibrillated before EMS arrival2338 (5.2%)
 Not defibrillated before EMS arrival37,784 (83.8%)
 Missing4945 (11.0%)
Witnessed arrest – n (%)
 Non-Witnessed14,828 (32.9%)
 Witnessed29,428 (65.3%)
 Missing811 (1.8%)
Bystander-CPR – n (%)
 CPR by laymen21,162 (47.0%)
 CPR by professional3402 (7.5%)
 No bystander-CPR16,594 (36.8%)
 Missing3909 (8.7%)
Place of arrest – n (%)
 Home30,970 (68.7%)
 Other place5977 (13.3%)
 Public place8081 (17.9%)
 Missing39 (0.1%)
Cause of arrest – n (%)
 Heart disease28,501 (63.2%)
 Overdose1293 (2.9%)
 Accident1168 (2.6%)
 Pulmonary disease2319 (5.1%)
 Suffocation1143 (2.5%)
 Suicide983 (2.2%)
 Drowning515 (1.1%)
 Other9145 (20.3%)
Time to 911 call (min)
 Median (IQR)2.0 (1.0, 6.0)
 Missing17,941 (39.8%)
Time to CPR (min)
 Median (IQR)3.0 (0.0, 10.0)
 Missing8149 (18.1%)
Time to defibrillation (min)
 Median (IQR)15.0 (9.0, 24.0)
 Missing31,402 (69.7%)
Time to EMS dispatch
 Median (IQR)1.0 (0.0, 2.0)
 Missing4263 (9.5%)
Time to EMS arrival
 Median (IQR)10.0 (6.0, 15.0)
 Missing6399 (14.2%)
Defibrillation – n (%)
 Defibrillated15,390 (34.1%)
 Not defibrillated27,802 (61.7%)
 Missing1875 (4.2%)
  1. IQR terquartile range