Table 4.
Univariate analysis of the factors for recurrent dislocation
| Factors | Recurrent (+) | Recurrent (−) | P value |
|---|---|---|---|
| Age (years old) | 63.0 ± 13.6 | 69.1 ± 10.3 | 0.1273 |
| Height (cm) | 153.3 ± 11.0 | 155.0 ± 11.3 | 0.6547 |
| Body weight (kg) | 55.8 ± 14.6 | 57.2 ± 12.8 | 0.7605 |
| BMI (kg/m2) | 23.6 ± 5.30 | 23.7 ± 3.26 | 0.9539 |
| Gender | Male: 50 % (6/12) | Male: 50 % (6/12) | 0.6353 |
| Female: 58.3 % (14/24) | Female: 41.7 % (10/24) | ||
| Indication of THA | OA: 45.5 % (5/11) | OA: 54.6 % (6/11) | 0.1391 |
| RA: 50 % (2/4) | RA: 50 % (2/4) | ||
| ONFH: 88.9 % (8/9) | ONFH: 11.1 % (1/9) | ||
| Revision: 41.7 % (5/12) | Revision: 58.3 % (7/12) | ||
| Diameters of femoral head | 22 mm: 55.6 % (5/9) | 22 mm: 44.4 % (4/9) | 0.9434 |
| 26 mm: 59.1 % (13/22) | 26 mm: 40.9 % (9/22) | ||
| 32 mm: 66.7 % (2/3) | 32 mm: 33.3 % (1/3) | ||
| Direction of dislocation | Anterior: 55.6 % (5/9) | Anterior: 44.4 % (4/9) | 1.0000 |
| Posterior: 55.6 % (15/27) | Posterior: 44.4 % (12/27) | ||
| Cup abduction (°) | 44.2 ± 8.87 | 42.8 ± 5.72 | 0.5750 |
| Cup anteversion (°) | 11.5 ± 7.87 | 13.2 ± 7.76 | 0.5160 |
| Timing of dislocation (month) | 21.6 ± 23.0 | 3.56 ± 4.65 | 0.0006* |
| Timing of dislocation (≤1 year, >1 year) | ≤1 year: 40.0 % (10/25) | ≤1 year: 60.0 % (15/25) | 0.0046* |
| >1 year: 90.9 % (10/11) | >1 year: 9.09 % (1/11) |
BMI body mass index, OA osteoarthritis, RA rheumatoid arthritis, ONFH idiopathic osteonecrosis of femoral head
Qualitative data were compared with χ2 test and quantitative data with the Pearson test
* Statically significant p-value <0.05