Table 2 Univariate analysis of the risk factors for transfusion in TKA
From: The incidence and risk factors for allogenic blood transfusion in total knee and hip arthroplasty
Variable | Non-transfusion (n = 436) | Transfusion (n = 105) | P value |
|---|---|---|---|
Female gender (%) | 350 (80.3) | 94 (89.5) | 0.027* |
Age, years (mean ± SD) | 67.5 (7.2) | 66.6 (8.5) | 0.264 |
BMI, kg/m2 (mean ± SD) | 26.1 (3.7) | 26.2 (4.3) | 0.762 |
Diabetes (%) | 69 (15.8) | 20 (19.1) | 0.424 |
Hypertension (%) | 198 (45.4) | 41 (39.1) | 0.238 |
Malignance (%) | 12 (2.8) | 4 (3.8) | 0.566 |
Smoking (%) | 28 (6.4) | 4 (3.8) | 0.308 |
Diagnosis of RA (%) | 36 (8.3) | 14 (13.3) | 0.107 |
PT, s (mean ± SD) | 11.4 (0.9) | 11.5 (0.8) | 0.189 |
INR (mean ± SD) | 0.99 (0.08) | 1.01 (0.07) | 0.192 |
APTT, s (mean ± SD) | 25.8 (3.9) | 26.5 (3.7) | 0.076 |
Preoperative Hb level, g/L (mean ± SD) | 128.8 (13.2) | 121.1 (14.5) | < 0.001* |
PLT, 109/L (mean ± SD) | 207.3 (65.3) | 204.1 (73.5) | 0.657 |
Operation time, min (mean ± SD) | 124.1 (22.7) | 124.6 (24.5) | 0.822 |
Intraoperative blood loss, mL (mean ± SD) | 189.4 (95.5) | 250.4 (151.0) | < 0.001* |