Table 1 Baseline and perioperative characteristics of patients with or without delirium
Characteristics | No delirium(n = 710) | Delirium(n = 105) | P-values |
|---|---|---|---|
Patients characteristics | |||
 Age (year) | 65.2 ± 9.6 | 71.9 ± 8.2 | < 0.001 |
 Male sex | 556 (78.3%) | 74 (70.5%) | 0.08 |
 BMI (kg/m2) | 24.6 ± 3.3 | 24.1 ± 3.1 | 0.13 |
ASA physical status | 0.32 | ||
 1 | 19 (2.7%) | 1 (1.0%) |  |
 2 | 200 (28.2%) | 25 (23.8%) |  |
 3 | 478 (67.3%) | 75 (71.4%) |  |
 4 | 13 (1.8%) | 4 (3.8%) |  |
 Hypertension | 456 (64.2%) | 83 (79.0%) | 0.003 |
 Diabetes mellitus | 349 (49.2%) | 57 (54.3%) | 0.33 |
 Dyslipidemia | 268 (37.7%) | 35 (33.3%) | 0.38 |
 Myocardial infarction | 80 (11.3%) | 15 (14.3%) | 0.37 |
 Atrial fibrillation | 50 (7.0%) | 7 (6.7%) | 0.89 |
 Chronic kidney disease | 275 (38.7%) | 43 (41.0%) | 0.66 |
 History of stroke | 452 (63.7%) | 64 (63.3%) | 0.59 |
 Left ventricle ejection fraction (%) | 55.1 ± 11.1 | 53.9 ± 12.5 | 0.30 |
 Hematocrit (%) | 34.8 ± 4.0 | 33.9 ± 4.1 | 0.03 |
 Creatinine (mg/dL) | 1.4 ± 1.7 | 1.5 ± 1.7 | 0.3 |
 Estimated GFR (ml/min/1.73m2) | 73.9 ± 27.3 | 63.5 ± 26.7 | < 0.001 |
 Albumin (g/dL) | 4.0 ± 0.4 | 3.8 ± 0.4 | < 0.001 |
 C-reactive protein (mg/dL) | 0.7 ± 1.4 | 1.1 ± 2.3 | 0.006 |
Intraoperative variables | |||
 Operation duration (min) | 362.2 ± 53.4 | 362.6 ± 61.7 | 0.95 |
 Anesthesia duration (min) | 438.1 ± 54.6 | 436.1 ± 68.2 | 0.77 |
 Re-do operation | 7 (1.0%) | 1 (1.0%) | 0.97 |
 Emergency | 76 (10.7%) | 12 (11.4%) | 0.82 |
Op year | 0.602 | ||
 2005–2009 | 54 | 6 |  |
 2010–2014 | 433 | 69 |  |
 2015- | 223 | 30 |  |
Postoperative medical status | |||
 ICU lengths of stay (days) | 2.3 ± 1.7 | 5.8 ± 7.1 | < 0.001 |
 Hospital lengths of stay (days) | 9.9 ± 7.1 | 22.1 ± 25.3 | < 0.001 |
 Acute kidney injury | 133 (18.7%) | 34 (32.4%) | 0.001 |
 New onset atrial fibrillation | 146 (20.6%) | 31 (29.5%) | 0.04 |
 Reintubation | 27 (3.8%) | 18 (17.1%) | < 0.001 |
 In-hospital death | 0 | 3 (2.9%) |  |