Table 3.
Univariate analysis of the factors for dislocation
| Factors | Dislocation (+), 11 hips in 11 cases | Dislocation (−), 623 hips in 568 cases | p value |
|---|---|---|---|
| Age at THAa (years) | 59.9 ± 16.1 | 63.4 ± 10.9 | 0.6025 |
| BMIa (kg/m2) | 25.0 ± 5.8 | 23.7 ± 3.7 | 0.7002 |
| Gender (hips) | Male: 4.95 % (5/101) | Male: 95.0 % (96/101) | 0.0079 |
| Female: 1.16 % (6/533) | Female: 98.8 % (527/533) | ||
| Primary diagnosis (hips) | OA: 1.1 % (6/556) | OA: 98.9 % (550/556) | 0.0006 |
| RA: 0 % (0/11) | RA: 100 % (11/11) | ||
| ONFH: 7.4 % (5/67) | ONFH: 92.5 % (62/67) | ||
| Head size (hips) | 26 mm: 2.3 % (11/465) | 26 mm: 97.7 % (454/465) | 0.0423 |
| 32 mm: 0.0 % (0/169) | 32 mm: 100 % (169/169) | ||
| Stem offset (hips) | Standard: 1.5 % (2/127) | Standard: 98.5 % (125/127) | 0.8362 |
| +4 mm offset: 1.7 % (9/507) | +4 mm offset: 97.9 % (498/507) | ||
| Cup abductiona (°) | 41.0 ± 7.92 | 39.4 ± 6.50 | 0.6337 |
| CA technique | CA(+): 0.43 % (1/230) | CA(+): 99.6 % (229/230) | 0.0334 |
| CA(−): 2.48 % (10/404) | CA(−): 97.5 % (394/404) |
BMI body mass index, OA osteoarthritis, RA rheumatoid arthritis, ONFH osteonecrosis of the femoral head, CA combined anteversion
aValues are given as mean ± SD