Table 1.
Patient characteristics (before and after propensity score matching).
| Before PS matching | After PS matching | |||||||
|---|---|---|---|---|---|---|---|---|
| OCM (n = 39) | DAA (n = 54) | p value | Standardized difference | OCM (n = 33) | DAA (n = 33) | p value | Standardized difference | |
| Gender, female/male, n | 11/28 | 13/41 | 0.653 | 0.094 | 10/23 | 11/22 | 0.792 | 0.069 |
| Age (y), mean (SD) | 60.8 (8.75) | 58.4 (11.79) | 0.293 | 0.228 | 60.5 (9.10) | 59.8 (12.25) | 0.785 | 0.070 |
| BMI (kg/m2), mean (SD) | 31.3 (8.49) | 28.5 (4.84) | 0.052 | 0.397 | 29.5 (6.70) | 29.0 (5.58) | 0.738 | 0.074 |
| Preoperative diagnosis, n (%) | ||||||||
| OA | 27 (69.2) | 35 (64.8) | 0.656 | 0.094 | 22 (66.7) | 20 (60.6) | 0.609 | 0.129 |
| ON | 12 (30.8) | 19 (35.2) | 11 (33.3) | 13 (39.4) | ||||
| Clinical outcome | ||||||||
| JOA score, mean (SD) | 88.7 (9.27) | 91.1 (8.63) | 0.270 | — | ||||
| Dislocation, n (%) | 2 (6.1) | 1 (3.0) | 0.555 | — | ||||
| Infection, n (%) | 1 (3.0) | 0 (0) | 0.314 | — | ||||
| Fracture, n (%) | 0 (0) | 0 (0) | — | — | ||||
Note: Data are shown as mean ± standard deviation, or number (%). ON, osteonecrosis of the femoral head.
Abbreviations: BMI, body mass index; OA, osteoarthritis; SD, standardized difference.