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Table 1 Characteristics 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
Age, years, mean (SD) 57.15 (9.09) 49.47 (11.63) < 0.001a
BMI (kg/m2), mean (SD) 25.64 (3.86) 24.38 (3.70) 0.007 a
Male, n (%) 74 (69.8) 134 (77.0) 0.181b
Smoking, n (%) 40 (37.7) 74 (42.5) 0.428b
Drinking, n (%) 25 (23.6) 46 (26.4) 0.595b
Married 104 (98.1) 172 (98.9) 0.614b
Coronary heart disease, n (%) 2 (1.9) 3 (1.7) 0.921b
Hypertension, n (%)    0.01b
No 21 (19.8) 49 (28.2)  
Level 1 22 (20.8) 51 (29.3)  
Level 2 34 (32.1) 28 (16.1)  
Level 3 29 (27.4) 46 (26.4)  
Education level, n (%)    0.582b
Primary and below 57 (53.8) 83 (47.7)  
Middle school 32 (30.2) 62 (35.6)  
High school and above 17 (16.0) 29 (16.7)  
Nature of occupation, n (%)    0.001b
Manual worker 77 (72.6) 93 (53.4)  
Non-manual worker 29 (27.4) 81 (46.6)  
Medical payment method, n (%)    0.002b
At one’s own expense 41 (38.7) 38 (21.8)  
Medical insurance 65 (61.3) 136 (78.2)  
History of cardiac surgery, n (%) 6 (5.7) 5 (2.9) 0.253b
No 10 (94.3) 169 (97.1)  
  1. a Student’s t test. b χ2 test
  2. BMI Body mass index