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Table 2 Training (N = 4321) and validation (N = 4501) dataset baseline characteristics for Critical Care Trauma Center (CCTC) and Medical-Surgical Intensive Care Unit (MSICU) at London Health Sciences Center (LHSC)

From: To develop a regional ICU mortality prediction model during the first 24 h of ICU admission utilizing MODS and NEMS with six other independent variables from the Critical Care Information System (CCIS) Ontario, Canada

Baseline characteristics Training, N (%) Validation, N (%)
Total number of subjects 4321 (48.98) 4501 (51.02)
Sex   
 Male 2475 (57.28) 2562 (56.92)
 Female 1846 (42.72) 1939 (43.08)
Age   
 0–39 582 (13.47) 609 (13.53)
 40–79 3146 (72.81) 3278 (72.83)
 ≥80 593 (13.72) 614 (13.64)
ICU   
 Critical Care Trauma Unit(CCTC) 2310 (53.46) 2324 (51.63)
 Medical and Surgical Intensive Care Unit(MSICU) 2011 (46.54) 2177 (48.37)
ICU admission source   
 Operating room/post-anesthesia care unit 932 (21.57) 1007 (22.38)
 Hospital—outside or within LHIN 789 (18.26) 775 (17.23)
 Emergency department 1264 (29.25) 1343 (29.85)
 Other sourcea 379 (8.77) 441 (9.80)
 Unit/ward 975 (22.15) 933 (20.74)
ICU admission diagnosis   
 Cardiovascular/cardiac/vascular 652 (15.09) 706 (15.69)
 Other diagnosisb 998 (23.10) 1082 (24.04)
 Gastrointestinal 452 (10.46) 532 (11.82)
 Respiratory 1405 (32.52) 1341 (29.79)
 Trauma 287 (6.64) 292 (6.49)
 Neurological 527 (12.20) 548 (12.18)
Multiple Organ Dysfunction Score (MODS)   
 0 245 (5.67) 275 (6.11)
 1–4 1725 (39.92) 1760 (39.10)
 5–8 1733 (40.11) 1802 (40.04)
 9–12 531 (12.29) 552 (12.26)
 >13 87 (2.01) 112 (2.49)
Nine Equivalents Nursing Manpower Use Score (NEMS)   
 0–22 557 (12.90) 527 (11.73)
 23–29 1401 (32.45) 1445 (32.16)
 ≥30 2359 (54.64) 2521 (56.11)
Modified Charlson’s Comorbidity Score (CCI)   
 0 3255 (75.33) 3354 (74.52)
 1–3 813 (18.82) 872 (19.37)
 >3 253 (5.86) 275 (6.11)
Re-admission to ICU (same hospital admission) 394 (9.12) 413 (9.18)
Mortality 986 (22.82) 1023 (22.73)
  1. a Other Source includes patients admitted from the following locations: home—within or outside LHIN, level 2 unit or step-down unit, level 3 unit (medical/surgical or specialty unit), complex continuing care facility, rehabilitation facility, outside province, other
  2. bOther diagnosis includes patients with the following diseases: metabolic/endocrine, genitourinary, musculoskeletal, skin, oncology, hematology, other