Table 2 Features of cardiac arrest events stratified by survival outcome
Variables | All patients | Patients surviving to hospital discharge | Death at hospital discharge | P value |
|---|---|---|---|---|
(n = 340) | (n = 50) | (n = 290) | ||
Arrest at night, n (%) | 218 (64) | 29 (58) | 189 (65) | 0.34 |
Arrest at the weekend, n (%) | 105 (31) | 17 (34) | 88 (30) | 0.62 |
Arrest location, n (%) | Â | Â | Â | 0.69 |
 Intensive care unit | 151 (44) | 23 (46) | 128 (44) | |
 General ward | 171 (50) | 26 (52) | 145 (50) | |
 Others | 18 (5) | 1 (2) | 17 (6) |  |
Witnessed arrest, n (%) | 241 (71) | 35 (70) | 206 (71) | 0.87 |
Monitored status, n (%) | 199 (59) | 28 (56) | 171 (59) | 0.76 |
Shockable rhythm, n (%) | 49 (14) | 14 (28) | 35 (12) | 0.007 |
Critical care interventions in place at time of arrest, n (%) | ||||
 Mechanical ventilation | 64 (19) | 7 (14) | 57 (20) | 0.44 |
 Anti-arrhythmics | 30 (9) | 5 (10) | 25 (9) | 0.79 |
 Vasopressors | 154 (45) | 16 (32) | 138 (48) | 0.05 |
 Dialysis | 23 (7) | 2 (4) | 21 (7) | 0.55 |
 Pulmonary artery catheter | 2 (0.6) | 2 (4) | 0 (0) | 0.02 |
 Intra-aortic balloon pumping | 1 (0.3) | 0 (0) | 1 (0.3) | 1 |
Lactate, mmol/L, mean (SD) | 9.6 (4.6) | 7.2 (4.1) | 10.0 (4.5) | <0.001 |
CPR duration, minutes, mean (SD) | 28.8 (26.9) | 12.4 (12.8) | 31.6 (27.7) | <0.001 |
Post-ROSC interventions, n (%) | ||||
 Extracorporeal membrane oxygenation | 20 (6) | 3 (6) | 17 (6) | 1 |
 Therapeutic hypothermia | 1 (0.3) | 0 (0) | 1 (0.3) | 1 |
 Percutaneous coronary intervention | 8 (2) | 3 (6) | 5 (2) | 0.10 |