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%)

The values are expressed as mean ± standard deviation or number (%). ASA American Society of Anesthesiologists, BMI Body mass index, GFR Glomerular filtration rate