Table 1.
Univariate analysis of blood transfusion in nonfracture patients after total hip arthroplasty.
| Total (n = 1635) | Transfusion (n = 258) | Nontransfusion (n = 1377) | P | |
|---|---|---|---|---|
| Age, years | 57.55 ± 11.38 | 57.29 ± 12.67 | 57.59 ± 11.12 | 0.716 |
| Gender (male) | 942 (57.6) | 106 (11.3) | 836 (88.7) | <0.001 |
| Height, cm | 165.45 ± 7.66 | 163.49 ± 7.66 | 165.82 ± 7.60 | <0.001 |
| Weight, kg | 68.57 ± 11.32 | 64.30 ± 11.61 | 69.37 ± 11.08 | <0.001 |
| BMI, kg/㎡ | 25.04 ± 3.67 | 24.02 ± 3.77 | 25.23 ± 3.62 | <0.001 |
| Blood type | 0.236 | |||
| A | 519 (31.7) | 70 (13.5) | 449 (86.5) | |
| B | 515 (31.5) | 84 (16.3) | 431 (83.7) | |
| O | 439 (26.9) | 80 (18.2) | 359 (81.8) | |
| AB | 162 (9.9) | 24 (14.8) | 138 (85.2) | |
| Smoking | 413 (25.3) | 29 (7.0) | 384 (93.0) | <0.001 |
| Alcoholism | 438 (26.8) | 42 (9.6) | 396 (90.4) | <0.001 |
| CCI | 1.73 ± 1.20 | 1.83 ± 1.32 | 1.71 ± 1.18 | 0.174 |
| Indications | 0.041 | |||
| ANFH | 1282 (78.4) | 189 (14.7) | 1093 (85.3) | |
| OA | 162 (9.9) | 28 (17.3) | 134 (82.7) | |
| RA | 8 (0.5) | 3 (37.5) | 5 (62.5) | |
| AS | 9 (0.6) | 4 (44.4) | 5 (55.6) | |
| DDH | 169 (10.3) | 33 (19.5) | 136 (80.5) | |
| Others | 5 (0.3) | 1 (20.0) | 4 (80.0) | |
| Anesthesia | 0.007 | |||
| General | 731 (44.7) | 135 (18.5) | 596 (81.5) | |
| Nongeneral | 904 (55.3) | 123 (13.6) | 781 (86.4) | |
| Operation time, min | 97.97 ± 45.31 | 122.95 ± 61.80 | 93.28 ± 39.82 | <0.001 |
| Procedures | <0.001 | |||
| Unilateral | 1518 (92.8) | 206 (13.6) | 1312 (86.4) | |
| Bilateral | 117 (7.2) | 52 (44.4) | 65 (55.6) | |
| Approach | 0.903 | |||
| Anterior | 17 (1.0) | 2 (11.8) | 15 (88.2) | |
| Posterior | 1618 (99.0) | 256 (15.8) | 1362 (84.2) | |
| Estimated blood loss, ml | 263.69 ± 212.70 | 429.26 ± 360.23 | 232.67 ± 152.92 | <0.001 |
| Drainage use | 342 (20.9) | 45 (13.2) | 297 (86.8) | 0.135 |
| TXA use | 604 (36.9) | 76 (12.6) | 528 (87.4) | 0.007 |
| Comorbidities | ||||
| Hypertension | 432 (26.4) | 65 (15.0) | 367 (85.0) | 0.626 |
| Diabetes | 116 (7.1) | 21 (18.1) | 95 (81.9) | 0.476 |
| Coronary heart disease | 91 (5.6) | 22 (24.2) | 69 (75.8) | 0.024 |
| Cerebrovascular diseases | 75 (4.6) | 11 (14.7) | 64 (85.3) | 0.787 |
| Arrhythmia | 17 (1.0) | 5 (29.4) | 12 (70.6) | 0.224 |
| Respiratory diseases | 69 (4.2) | 12 (17.4) | 57 (82.6) | 0.708 |
| Digestive diseases | 98 (6.0) | 16 (16.3) | 82 (83.7) | 0.878 |
| Urinary diseases | 35 (2.1) | 5 (14.3) | 30 (85.7) | 0.806 |
| Mental diseases | 15 (0.9) | 2 (13.3) | 13 (86.7) | 1.000 |
| Fibroid | 28 (1.7) | 2 (7.1) | 26 (92.9) | 0.206 |
| Preoperative Hb, g/L | 135.96 ± 15.41 | 128.66 ± 17.37 | 137.33 ± 14.62 | <0.001 |
| Preoperative HCT, % | 40.57 ± 4.07 | 38.66 ± 4.48 | 40.92 ± 3.89 | <0.001 |
| Preoperative RDW, % | 13.14 ± 1.03 | 13.30 ± 1.26 | 13.11 ± 0.98 | 0.021 |
| Preoperative WBC, n/L | 6.30 ± 1.76 | 5.89 ± 1.73 | 6.37 ± 1.75 | <0.001 |
| Preoperative PLT, n/L | 223.82 ± 60.70 | 227.40 ± 64.56 | 233.85 ± 59.92 | 0.117 |
| Preoperative RET, % | 0.06 ± 0.02 | 0.05 ± 0.02 | 0.06 ± 0.02 | <0.001 |
BMI: body mass index; CCI: Charlson comorbidity index; ANFH: avascular necrosis of femoral head; OA: osteoarthritis; RA: rheumatoid arthritis; AS: ankylosing spondylitis; DDH: developmental dysplasia of the hip; TXA: tranexamic acid; Hb: hemoglobin; HCT: hematocrit; RDW: red cell distribution width; WBC: white blood cell; PLT: platelet; RET: reticulocyte.