Table 1 Patient characteristics
Variable | First 12 months | Last 12 months | Whole study period |
|---|---|---|---|
No. of patients | 3111 | 3293 | 6404 |
Age (yr), mean ± SD | 64.6 ± 17.5 | 63.2 ± 18.2 | 63.8 ± 17.9 |
Male sex, n (%) | 1743 (56) | 1975 (60) | 3718 (58) |
SAPS II at admission, mean ± SD | 34.2 ± 17.3 | 36.8 ± 17.8 | 35.5 ± 17.6 |
Type of admission, n (%) | |||
Medical | 2180 (70) | 2173 (66) | 4353 (68) |
Scheduled surgery | 465 (15) | 590 (18) | 1055 (16.5) |
Unscheduled surgery | 466 (15) | 530 (17) | 996 (15.5) |
Principal reason for admission to unit, n (%) | |||
Cardiovascular disorders | 872 (28) | 985 (30) | 1857 (29) |
Respiratory disorders | 531 (17) | 461 (14) | 992 (15.5) |
Neurological disorders | 373 (12) | 421 (12.8) | 794 (12.4) |
Gastrointestinal disorders | 292 (9.4) | 336 (10.2) | 628 (9.8) |
Trauma | 311 (10) | 290 (8.8) | 601 (9.4) |
Intoxication | 155 (5) | 165 (5) | 320 (5) |
Metabolic disorders | 124 (4) | 132 (4) | 256 (4) |
Other | 452 (14.5) | 504 (15.3) | 956 (14.9) |
Length of ICU stay, days | |||
Mean ± SD | 2.8 ± 5.3 | 2.9 ± 5.2 | 2.8 ± 5.3 |
Median (25th percentile, 75th percentile) | 1.4 (1.0, 3) | 1.1(0.8, 2.5) | 1.2 (0.8, 2.7) |
ICU mortality, n (%) | 182 (5.8) | 176 (5.3) | 358 (5.6) |