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Table 2 Univariate analysis of the risk factors for DVT in TJA

From: Perioperative allogenic blood transfusion increases the incidence of postoperative deep vein thrombosis in total knee and hip arthroplasty

Variable Non-DVT (n = 658) DVT (n = 57) P value
Female gender (%) 460 (69.9) 47 (82.5) 0.045*
Age, years (mean ± SD) 64.7 ± 12.8 70.6 ± 8.8 < 0.001*
BMI, kg/m2 (mean ± SD) 24.6 ± 4.2 25.9 ± 4.4 0.026*
Diabetes (%) 110 (16.7) 6 (10.5) 0.224
Hypertension (%) 291 (44.2) 31 (54.4) 0.139
Malignance (%) 29 (4.4) 1 (1.8) 0.338
Cardiovascular disease (%) 77 (11.7) 7 (12.3) 0.896
Stroke (%) 84 (12.8) 11 (19.3) 0.163
COPD (%) 10 (1.5) 1 (1.8) 0.890
Venous disease (%) 23 (3.5) 1 (1.8) 0.484
Previous surgery (%) 18 (2.7) 0 (0) 0.206
Preoperative aspirin (%) 92 (14.0) 7 (12.3) 0.721
Preoperative steroid (%) 27 (4.1) 0 (0) 0.119
Smoking (%) 86 (13.1) 5 (8.8) 0.350
Diagnosis 0.001*
TKA (%) 277 (42.1) 42 (73.7) < 0.001*
Operation time, min (mean ± SD) 109.9 ± 29.3 107.7 ± 24.2 0.585
Intraoperative blood loss, ml (mean ± SD) 262.9 ± 213.5 211.8 ± 136.2 0.076
Chemical thromboprophylaxis 0.185
Transfusion (%) 77 (11.7) 12 (21.1) 0.040*
  1. *P < 0.05 was considered statistically significant
  2. aDVT deep vein thrombosis, TJA total joint arthroplasty, SD standard deviation, BMI body mass index, COPD chronic obstructive pulmonary disease, TKA total knee arthroplasty