Table 1. Comparison of clinical variables of all patients.
| Variable | Survivors (n=552) | Non-survivors (n=637) | P value |
|---|---|---|---|
| Age (years), mean ± SD | 63.3±16.5 | 67.0±14.6 | <0.001 |
| Age subgroup, n (%) | 0.007 | ||
| ≤75 years | 408 (73.9) | 425 (66.7) | |
| >75 years | 144 (26.1) | 212 (33.3) | |
| Gender, n (%) | 0.592 | ||
| Male | 330 (59.8) | 391 (61.4) | |
| Female | 222 (40.2) | 246 (38.6) | |
| Length of ICU stay, n (%) | <0.001 | ||
| ≤27 days | 337 (61.1) | 319 (50.1) | |
| ≥28 days | 215 (38.9) | 318 (49.9) | |
| APACHE II scores, mean ± SD | 19.6±8.2 | 22.6±8.5 | <0.001 |
| APACHE II scores subgroup, n (%) | <0.001 | ||
| <25 | 398 (72.1) | 367 (57.6) | |
| ≥25 | 154 (27.9) | 270 (42.4) | |
| Renal replacement therapy, n (%) | <0.001 | ||
| None | 439 (79.5) | 336 (52.7) | |
| CRRT | 14 (2.5) | 61 (9.6) | |
| IHD | 61 (11.1) | 98 (15.4) | |
| CRRT and IHD | 38 (6.9) | 142 (22.3) | |
| Cause of prolonged ICU stay, n (%) | |||
| Using vasopressor or arrhythmia | 51 (9.2%) | 157 (24.6) | <0.001 |
| Renal failure | 73 (13.2%) | 159 (25.0) | <0.001 |
| Hepatic failure | 11 (2.0%) | 42 (6.6) | <0.001 |
| Massive gastrointestinal tract bleeding | 28 (5.1%) | 87 (13.7) | <0.001 |
| Sepsis | 423 (76.6%) | 473 (74.3) | 0.346 |
| Need further operation | 60 (10.9%) | 23 (3.6) | <0.001 |
| Requiring FiO2 ≥40% | 28 (5.1%) | 83 (13.0) | <0.001 |
| Using PEEP ≥10 cm H2O | 16 (2.9%) | 37 (5.8) | 0.016 |
CRRT, continuous renal replacement therapy; IHD, intermittent hemodialysis.