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Table 2 Patient’s clinical characteristics

From: Incidence and risk factors of postoperative delirium in the elderly patients with hip fracture

Variable Delirium (n = 59) Non-delirium (n = 247)   
Age 81.9 ± 5.4 76.4 ± 8.1 t = − 0.647 p = 0.000
Gender(M/F) 23/36 81/166 χ2 = 0.813 p = 0.367
Hypertension (n) 27 147 χ2 = 3.672 p = 0.550
Coronary heart disease (n) 35 187 χ2 = 6.421 p = 0.011
Diabetes (n) 36 192 χ2 = 7.006 p = 0.008
Cerebral infarction (n) 44 214 χ2 = 5.240 p = 0.020
Hospitalization 24.2 ± 15.1 16.0 ± 7.2 t = − 4.102 p = 0.000
Preoperative hospitalization 5.5 ± 3.4 3.7 ± 1.7 t = − 3.677 p = 0.000
Albumin infusion 16.7 ± 33.1 1.8 ± 7.1 t = − 3.449 p = 0.000
Preoperative HCT 33.5 ± 4.9 35.2 ± 5.2 t = 2.327 p = 0.021
Postoperative HCT 28.2 ± 4.9 29.4 ± 4.8 t = 1.641 p = 0.102
BMI 22.2 ± 3.2 22.7 ± 3.2 t = 1.080 p = 0.281
Blood transfusion volume 1.4 + 2.1 0.5 ± 1.0 t = − 3.296 p = 0.002
Preoperative leucocyte count 9.6 ± 2.6 8 ± 2.1 t = − 4.072 p = 0.000
Preoperative Hb 11.3 ± 1.6 12.0 ± 5.5 t = 0.840 p = 0.402
Preoperative albumin 36.5 ± 3.7 37.8 ± 4.0 t = 2.132 p = 0.034
Preoperative TP 64.6 ± 4.8 64.7 ± 5.8 t = 0.046 p = 0.963
NYHA 2.2 ± 0.7 1.8 ± 0.6 t = − 3.606 p = 0.001
ASA 2.9 ± 0.5 2.4 ± 0.5 t = − 7.713 p = 0.000
Anesthesia 25/34 126/121 χ2 = 1.422 p = 0.233
Surgery 30/29 114/133 χ2 = 0.421 p = 0.516
Operation time 88.5 ± 40.3 79.0 ± 24.3 t = − 1.733 p = 0.088
The anesthesia time 157.7 ± 50.9 150.3 ± 33.4 t = − 1.066 p = 0.290
Intraoperative blood loss 127.1 ± 95.2 105.1 ± 33.4 t = − 1.666 p = 0.046
Postoperative Na+ 139.0 ± 4.7 139.6 ± 4.0 t = 0.922 p = 0.357
Postoperative K+ 4.3 ± 0.5 4.3 ± 0.4 t = 0.309 p = 0.758
Postoperative leucocyte count 9.6 ± 2.6 8.6 ± 2.4 t = − 2.717 p = 0.007
Postoperative Hb 9.4 ± 1.9 9.7 ± 1.6 t = 1.237 p = 0.217
DVT (N) 15 52 t = 0.523 p = 0.466
  1. ASA American Society of Anesthesiologists, NYHA New York Heart Association, BMI body mass index, DVT deep venous thrombosis, HCT hematocrit, Hb hemoglobin, TP total protein, F female, M male, N numbers