Table 2 Characteristics of hips with different ranges of operative femoral anteversion
|  | Group 1 (<10°, 42 hips) | Group 2 (10–30°, 74 hips) | Group 3 (>30°, 10 hips) | P-value |
|---|---|---|---|---|
Age (years) | 53 ± 12 | 49 ± 15 | 40 ± 11 | 0.022†,£ |
Height (m) | 1.66 ± 0.09 | 1.66 ± 0.08 | 1.63 ± 0.09 | 0.529 |
Weight (kg) | 66.8 ± 12.7 | 67.9 ± 14.3 | 64.4 ± 8.5 | 0.714 |
BMI (kg/m2) | 24.09 ± 3.49 | 24.50 ± 4.08 | 24.26 ± 2.80 | 0.857 |
Female/male sex, n | 16/26 | 37/37 | 7/3 | 0.157 |
Diagnosis, n (%) |  |  |  | 0.032†,£ |
 DDH | 10 (23.8) | 22 (29.7) | 7 (70) |  |
 Osteonecrosis | 15 (35.7) | 34 (45.9) | 0 (0) |  |
 Ankylosing spondylitis | 9 (21.4) | 10 (13.5) | 0 (0) |  |
 Rheumatoid arthritis | 2 (4.8) | 3 (4.1) | 1 (10) |  |
 Slipped epiphysis of the femoral head | 1 (2.4) | 3 (4.1) | 2 (20) |  |
 Posttraumatic arthritis | 1 (2.4) | 0 (0) | 0 (0) |  |
 Sequelae of hip pyogenic arthritis | 1 (2.4) | 0 (0) | 0 (0) |  |
 Displaced femoral neck fracture | 3 (7.1) | 2 (2.7) | 0 (0) |  |
Use of the neck-adjustable femoral stem | 2 (4.8) | 7 (9.5) | 5 (50) | <0.001†,£ |