Table 1.
Baseline characteristics of patients.
| Total (n = 11,832) | Number (Percent) | Median (IQR) |
|---|---|---|
| Gender, male | 6979 (59.0%) | - |
| Age (year) | - | 66 (53–74) |
| Body mass index (kg m–2) | - | 23.3 (20.9–25.7) |
| Operative characteristics | ||
| - Operation time (h) | - | 3.4 (1.7–5.0) |
| - Emergency operation | 1290 (10.9%) | - |
| - Surgery type | ||
| - Cardiovascular or thoracic surgery | 4642 (39.2%) | - |
| - General surgery | 2663 (22.5%) | - |
| - Neuro or spine surgery | 2134 (18.0%) | - |
| - Neuro or spine surgery | 1873 (15.8%) | - |
| - Orthopedic, OBGY, urologic surgery | 520 (4.4%) | - |
| Duration in ICU (h) | - | 23.0 (18.0–51.0) |
| Duration in hospital (day) | - | 16.0 (11.0–30.0) |
| Preoperative morbidity | ||
| - APACHE II | - | 22.0 (15.0–28.0) |
| - ASA classification | ||
| - I | 1372 (11.6%) | - |
| - II | 4723 (39.9%) | - |
| - III | 4863 (41.1%) | - |
| - IV + V + VI | 874 (7.4%) | - |
| - History of hypertension | 2588 (21.9%) | - |
| - History of ischemic heart disease | 1891 (16.0%) | - |
| - History of diabetes mellitus | 1227 (10.4%) | - |
| - Diagnosis of cancer | 3875 (32.8%) | - |
| Preoperative laboratory test results within one month | ||
| - Blood urea nitrogen (mg dL–1) | - | 14 (11–20) |
| - Creatinine (mg dL–1) | - | 0.8 (0.6–1.1) |
| - Aspartate aminotransferase (IU L–1) | - | 26 (19–44) |
| - Alanine aminotransferase (IU L–1) | - | 18 (11–30) |
| - Hemoglobin (g dL–1) | - | 11.2 (9.9–12.7) |
| - Platelet (103 μL–1) | - | 183 (133–242) |
| - White blood cell (103 μL–1) | - | 10.4 (7.5–14.1) |
| - Serum sodium (mmol L–1) | - | 139 (136–141) |
| - Serum potassium (mmol L–1) | - | 4.0 (3.7–4.3) |
| Laboratory results within 24 h after ICU admission time | ||
| - C-reactive protein (mg L–1) | - | 40.2 (6.0–88.4) |
| - Albumin (g L–1) | - | 32 (27–37) |
| - C-reactive protein/albumin ratio | - | 1.2 (0.1–4.8) |
| 1-year mortality after ICU admission | - | 2246 (19.0%) |
| 30-day mortality after ICU admission | - | 745 (6.3%) |
Values are expressed as the median (IQR) or number (percentage). IQR, interquartile; CRP, C-reactive protein; APACHE, Acute Physiology and Chronic Health Evaluation; ICU, intensive care unit; OBGY, obstetric and gynecologic; OPH, ophthalmic; ENT, ear-nose-throat; DT, dental; ASA, American Society of Anesthesiologists.