Table 1 Baseline characteristics
| Â | All | 2-year survivors | 2-year non-survivors | p-value |
|---|---|---|---|---|
n | 415 | 174 (41.9%) | 241 (58.1%) | Â |
Sociodemographics | ||||
 Age (years), mean (SD) | 64.7 (14.9) | 59 (14.5) | 68.8 (13.7) |  < 0.001 |
 Male gender | 301 (72.5%) | 141 (81.0%) | 160 (66.4%) |  < 0.001 |
Comorbidities | ||||
 Hypertension | 206 (49.9%) | 85 (48.9%) | 121 (50.6%) | 0.72 |
 Coronary artery disease | 242 (58.6%) | 114 (65.5%) | 128 (53.6%) | 0.015 |
 Congestive heart failure | 58 (14.0%) | 20 (11.5%) | 38 (15.9%) | 0.2 |
 COPD | 40 (9.7%) | 5 (2.9%) | 35 (14.6%) |  < 0.001 |
 Diabetes | 91 (22.0%) | 24 (13.8%) | 67 (28.0%) |  < 0.001 |
 Chronic kidney disease | 61 (14.8%) | 14 (8.0%) | 47 (19.7%) | 0.001 |
 End-stage liver disease | 9 (2.2%) | 1 (0.6%) | 8 (3.3%) | 0.057 |
 Malignant disease | 47 (11.4%) | 7 (4.0%) | 40 (16.7%) |  < 0.001 |
Resuscitation parameters | ||||
 IHCA | 54 (13.0%) | 20 (11.5%) | 34 (14.2%) | 0.43 |
 No-flow time (minutes), mean (SD) | 4 (6) | 1 (3) | 5 (7) |  < 0.001 |
 Low-flow time (minutes), mean (SD) | 20 (17) | 16 (13) | 23 (19) |  < 0.001 |
 Witnessed cardiac arrest | 334 (81.1%) | 162 (93.6%) | 172 (72.0%) |  < 0.001 |
 Bystander CPR | 280 (67.8%) | 145 (83.3%) | 135 (56.5%) |  < 0.001 |
 Bystander CPR professional | 93 (40.8%) | 49 (45.0%) | 44 (37.0%) | 0.22 |
Initial rhythm |  |  |  |  < 0.001 |
 VF | 204 (49.4%) | 125 (71.8%) | 79 (33.1%) |  |
 VT | 19 (4.6%) | 11 (6.3%) | 8 (3.3%) |  |
 PEA | 91 (22.0%) | 12 (6.9%) | 79 (33.1%) |  |
 Asystole | 75 (18.2%) | 10 (5.7%) | 65 (27.2%) |  |
 Unknown | 24 (5.8%) | 16 (9.2%) | 8 (3.3%) |  |
Clinical/laboratory parameters on ICU admission | ||||
 GCS, mean (SD) | 5 (4) | 7 (5) | 4 (3) |  < 0.001 |
 Endotracheal intubation | 353 (86.1%) | 127 (74.3%) | 226 (94.6%) |  < 0.001 |
 Haemodynamic support (mechanical) | 47 (11.5%) | 15 (8.8%) | 32 (13.4%) | 0.15 |
 Haemodynamic support (pharmacological) | 289 (70.5%) | 111 (64.9%) | 178 (74.5%) | 0.036 |
 Lactate (mmol/l), mean (SD) | 6.8 (4.4) | 4.9 (3.1) | 8.1 (4.7) |  < 0.001 |
 pH, mean (SD) | 7.22 (0.16) | 7.27 (0.11) | 7.20 (0.17) |  < 0.001 |