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Table 2 Clinical data of delirium group and non-delirium group

From: Risk factors for postoperative delirium in patients with triple-branched stent graft implantation

Variables Delirium (N = 106) Non-delirium (N = 174) P
Preoperative data
First blood sugar (mmol/l), mean (SD) 8.54 (4.57) 7.16 (1.82) < 0.001a
White blood cell (×109/l), mean (SD) 11.27 (4.51) 11.63 (4.63) 0.518a
Neutrophil (× 109/l), mean (SD) 11.38 (7.47) 12.42 (7.31) 0.250a
Red blood cell (×109/l),
mean (SD)
4.29 (0.79) 4.42 (0.604) 0.144a
Hemoglobin (g/l), mean (SD) 129.68 (20.83) 134.14 (18.09) 0.060a
Anemia, n (%) 15 (14.2) 24 (13.8) 0.933b
Intraoperative data
State of consciousness, n (%)    0.781b
Quiet 43 (40.6) 78 (44.8)  
Irritability 45 (42.5) 68 (39.1)  
Coma 18 (17.0) 28 (16.1)  
ASA class, n (%)    0.304b
Level III 20 (18.9) 40 (23.0)  
Level IV and above 86 (81.1) 134 (77.0)  
Blood loss (ml), mean (SD) 842.26 (343.15) 809.20 (365.68) 0.453a
Allogeneic blood transfusion (ml), mean (SD) 359.06 (280.19) 334.20 (275.17) 0.467a
Erythrocyte transfusion, (u)
mean (SD)
2.99 (2.88) 2.93 (2.71) 0.870a
Platelet transfusion, (u),
mean (SD)
2.39 (2.82) 1.97 (2.94) 0.246a
Surgery duration (min), median (IQR) 288.5 (250.8334.3) 285.0 (249.5333.0) 0.877c
CPB (min), median (IQR) 142.0 (125.8171.3) 140.0 (115.0,176.0) 0.375c
Aortic cross-clamping duration (min), median (IQR) 60.0 (45.8,84.0) 52.0 (40.0,77.5) 0.010c
Lowest temperature, (°C)
mean (SD)
23.22 (2.53) 23.37 (2.51) 0.629a
SCP (min), median (IQR) 12.0 (10.0,15.5) 12.0 (10.0,15.3) 0.168c
Postoperative data    
APACHE-II, mean (SD) 16.17 (4.05) 12.40 (3.33) < 0.001a
Analgesics and sedatives, n (%)    < 0.001b
 0–2 30 (28.3) 101 (58.0)  
 3–4 63 (59.4) 63 (36.2)  
  > 4 13 (12.3) 10 (5.7)  
Mechanical ventilation duration (hours), median (IQR) 63.5 (38.00,139.0) 40.32 (26.58,82.25) < 0.001c
Hypoxemia, n (%) 41 (38.7) 27 (15.5) < 0.001b
No 65 (61.3) 147 (84.5)  
ICU stay, median (IQR) 7.0 (5.0,9.0) 5.0 (4.0,7.0) < 0.001c
Hospitalization days,
median (IQR)
20.0 (15.0,26.0) 18.0 (14.0,23.0) 0.759c
  1. a Student’s t test. b χ2 test. c Wilcoxon rank-sum test
  2. ASA American Society of Anesthesiologists, SCP Selective cerebral perfusion, APACHE-II Acute physiology and chronic health evaluation II, ICU Intensive care unit