Table 1 Baseline characteristics
All patients | More than 48 h ICU stay | ||
Patients and cultures baseline characteristics | |||
Number of admissions between 1997 and 2017 | 17,511 | 9588 | |
Age in years, mean (SD) | 65.3 (14.5) | 66.0 (13.6) | |
Males, N (%)/females N (%) | 11,093 (63.4%)/6414 (36.6%) | 6077 (63.4%)/3508 (36.3%) | |
Length of ICU stay in days, median (IQR) | 3.0 (4.0) | 6.0 (6.0) | |
APACHE II score | Median (IQR) | 20.0 (11.0) | 22.0 (11.0) |
APACHE II < 20, N (%) | 8281 (47.3%) | 3428 (35.8%) | |
APACHE II > = 20, N (%) | 8320 (47.5%) | 5767 (60.1%) | |
Missing, N (%) | 910 (5.6%) | 393 (4.1%) | |
Patient category | Cardiothoracic surgery, N (%) | 6109 (34.9%) | 3021 (31.5%) |
Internal medicine, N (%) | 2434 (13.9%) | 1666 (17.4%) | |
Surgery, N (%) | 3361 (19.2%) | 1751 (18.2%) | |
Cardiology, N (%) | 2468 (14.1%) | 1540 (16.1%) | |
Pulmonology, N (%) | 1529 (8.7%) | 1047 (10.9%) | |
Neurology, N (%) | 527 (3.0%) | 299 (3.1%) | |
Other, N (%) | 1009 (5.8%) | 264 (2.8%) | |
Missing, N (%) | 74 (0.4%) | 3 (0.03%) | |
Admission type | Medical*, N (%) | 9335 (53.3%) | 5787 (60.4%) |
Elective surgery, N (%) | 3964 (22.6%) | 1696 (17.7%) | |
Scheduled surgery, N (%) | 1264 (7.2%) | 532 (5.5%) | |
Urgent surgery, N (%) | 1553 (8.9%) | 825 (8.6%) | |
Emergency surgery, N (%) | 624 (3.6%) | 358 (3.7%) | |
Missing, N (%) | 771 (4.4%) | 390 (4.1%) | |
Treated with SDD# | Yes, N (%) | 12,054 (86.0%) | 7141 (93.5%) |
No, N (%) | 1043 (7.4%) | 83 (1.1%) | |
Missing, N (%) | 919 (6.6%) | 416 (5.4%) | |
ICU mortality, N (%) | 2459 (14.0%) | 1537 (16.0%) | |
Cultures | |||
Distribution of specimen | Digestive tract cultures, N (%) | 68,057 (41.9%) | |
Sputum cultures, N (%) | 37,827 (23.3%) | ||
Skin and wound cultures | 7308 (4.5%) | ||
Urine cultures | 8212 (5.1%) | ||
Blood cultures | 27,884 (17.2%) | ||
Abdominal cavity cultures | 1125 (0.7%) | ||
Other | 11,236 (6.9%) | ||
Unknown | 586 (0.4%) | ||
Total number of cultures | 162,235 | ||