| Transfusion(n = 391) | Non-transfusion(n = 5011) | t/z/χ2 | P |
---|---|---|---|---|
Age, years | 67 (61,72) | 66 (61,71) | 1.656 | 0.098 |
Sex | Â | Â | 17.307 | 0.000 |
 Male | 57 | 1192 |  |  |
 Female | 334 | 3819 |  |  |
BMI, Kg/m2 | 26.04 (23.52,29.14) | 27.34 (24.88,29.69) | 5.292 | 0.000 |
Duration of disease, years | Â | Â | 11.731 | 0.008 |
 <1 | 19 | 251 |  |  |
 1–3 | 29 | 562 |  |  |
 3–10 | 125 | 1816 |  |  |
 >10 | 218 | 2382 |  |  |
Smoking | 28 | 503 | 3.387 | 0.066 |
Alcohol | 24 | 553 | 9.119 | 0.003 |
Allergies | 65 | 754 | 0.701 | 0.402 |
Transfusion history | 58 | 294 | 47.872 | 0.000 |
Blood type (Rh) | Â | Â | 0.000 | 1.000 |
 Rh+ | 389 | 4990 |  |  |
 Rh- | 2 | 21 |  |  |
Blood type (ABO) | Â | Â | 3.748 | 0.290 |
 A | 101 | 1493 |  |  |
 B | 121 | 1540 |  |  |
 O | 124 | 1401 |  |  |
 AB | 45 | 577 |  |  |
 CCI | 3 (2,3) | 3 (2,3) | 1.065 | 0.287 |
Indications | Â | Â | Â | 0.155* |
 Osteoarthritis | 372 | 4835 |  |  |
 Rheumatoid arthritis | 16 | 151 |  |  |
 Traumatic arthritis | 3 | 10 |  |  |
 Psoriatic arthritis | 0 | 6 |  |  |
 Others | 0 | 9 |  |  |
Procedures | Â | Â | 653.561 | 0.000 |
 Bilateral TKA | 231 | 570 |  |  |
 Unilateral TKA | 160 | 4441 |  |  |
TXA use | 130 | 2060 | 9.345 | 0.002 |
Comorbidities | ||||
 Hypertension | 186 | 2549 | 1.578 | 0.209 |
 Diabetes mellitus | 68 | 801 | 0.532 | 0.466 |
 Coronary heart disease | 67 | 687 | 3.544 | 0.060 |
 Arrhythmia | 9 | 139 | 0.303 | 0.582 |
 Heart failure | 1 | 6 |  | 0.471* |
 Other cardiac diseases | 8 | 78 | 0.555 | 0.456 |
 Peripheral vascular disease | 8 | 114 | 0.086 | 0.769 |
 Cerebrovascular disease | 38 | 342 | 4.644 | 0.031 |
 Mental illness | 3 | 45 | 0.070 | 0,791 |
 Pulmonary disease | 9 | 180 | 1.789 | 0.181 |
 Digestive system disease | 22 | 359 | 1.308 | 0.253 |
 Urinary system diseases | 5 | 121 | 2.054 | 0.152 |
 Gynecologic diseases | 12 | 149 | 0.011 | 0.915 |
Laboratory tests | ||||
 RET, 109/μl | 61 (57,78) | 64 (52,78) | 3.517 | 0.000 |
 MCV, fL | 89.5 (86.4,92.6) | 89.4 (86.7,92.2) | 0.257 | 0.797 |
 MCH, Pg | 29.7 (28.6,30.7) | 29.9 (28.9,30.9) | 2.291 | 0.022 |
 MCHC, g/L | 332.0 (324.0,340.0) | 333.0 (327.0,341.0) | 3.563 | 0.000 |
 Hb, g/L | 80.0 (74.0,91.0) | 105.0 (95.00,115.0) | 23.463 | 0.000 |
 RDW, % | 13.0 (12.5,13.7) | 12.8 (12.4,13.3) | 23.046 | 0.000 |
 PLT, 109/L | 146.0 (121.0,179.0) | 179.0 (149.0,213.0) | 11.825 | 0.000 |
 PDW, fL | 11.7 (10.8,13.2) | 11.8 (10.8,13.0) | 0.452 | 0.651 |