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Table 1 Baseline characteristics

From: The ecological effects of selective decontamination of the digestive tract (SDD) on antimicrobial resistance: a 21-year longitudinal single-centre study

  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  
  1. Continuous data are shown as mean and standard deviation (SD) in case of normal distribution
  2. *Medical patients are all patients without previous surgery preceding ICU admission
  3. #Data available since 2002