Table 1 Patient characteristics and outcomes
Clinical characteristic | Number |
|---|---|
Number of patients | 33,557 |
Age, mean (SD) | 67.6 (15.0) |
Male | 20,515 (61.1%) |
Elective admission | 19,649 (58.6%) |
Admission classification | |
 Elective surgery | 19,774 (58.9%) |
 Emergency surgery | 4343 (12.9%) |
 Non-surgical | 9440 (28.1%) |
Admission source | |
 Operating room | 23,272 (69.4%) |
 Emergency room | 6792 (20.2%) |
 Hospital ward | 2728 (8.1%) |
 Other ICU, same hospital | 95 (0.3%) |
 Coronary care unit | 21 (0.1%) |
 High care unit | 333 (1.0%) |
 Other hospital | 315 (0.9%) |
Chronic illness | |
 Immunosuppression | 1862 (5.5%) |
 Maintenance dialysis | 1610 (4.8%) |
 Metastatic tumor | 1363 (4.1%) |
 Respiratory failure | 331 (1.0%) |
 Liver cirrhosis | 392 (1.2%) |
 Heart failure | 412 (1.2%) |
 Acute leukemia/Multiple myeloma | 181 (0.5%) |
 Lymphoma | 201 (0.6%) |
 Liver failure | 149 (0.4%) |
 AIDS | 20 (0.1%) |
Disease category | |
 Cardiovascular | 11,694 (34.8%) |
 Neurological | 4664 (13.9%) |
 Respiratory | 4940 (14.7%) |
 Gastrointestinal | 6579 (19.6%) |
 Musculoskeletal | 1277 (3.8%) |
 Genitourinary | 1292 (3.9%) |
 Trauma | 773 (2.3%) |
 Metabolic | 778 (2.3%) |
 Hematological | 120 (0.4%) |
 Gynecological | 771 (2.3%) |
 Other | 669 (2.0%) |
Outcome | |
 APACHE III score, mean (SD) | 58.3 (27.9) |
 APACHE III-j predicted risk of death, mean % (SD) | 17.0 (22.8) |
 Length of ICU stay, median days (IQR) | 2 (2–5) |
 Length of hospital stay, median days (IQR) | 20 (12–36) |
 Deaths before ICU discharge | 1291 (3.8%) |
 Deaths before hospital discharge | 2728 (8.1%) |