Variable | Intervention | Control | Significance | ||
---|---|---|---|---|---|
Mean ± SD | Frequency n = 450 (%) | Mean ± SD | Frequency n = 450 (%) | P value | |
CPR duration (min) | 41.51 (6.67) | Â | 42.54 (6.57) | Â | 0.025a |
Initial cardiac rhythm | 0.236b | ||||
 Asystole | 185 (41.1) |  | 183 (40.7) | ||
 Ventricular tachycardia | 38 (8.4) |  | 33 (7.3) | ||
 Ventricular fibrillation | 42 (9.3) |  | 61 (13.6) | ||
 Pulseless electrical activity and bradyarrhythmia | 185 (41.1) |  | 173 (38.4) | ||
First shock success rate | 49 (10.9) | Â | 57 (12.7) | 0.469b | |
Return of spontaneous circulation | 300 (66.7%) |  | 191 (42.4%) | < 0.001a | |
Survival status upon ICU discharge | < 0.001b | ||||
 Alive | 269 (59.8) |  | 151 (33.3) | ||
 Dead | 181 (40.2) |  | 299 (66.4) | ||
Survival status upon hospital discharge | < 0.001b | ||||
 Alive | 243 (54) |  | 128 (28.4) | ||
 Dead | 207 (46) |  | 322 (71.6) |