Table 2.
Comparison of the CT measurement values between control and hip dysplasia groups
| Parameters | Control (n = 40 hips) | Hip dysplasia (n = 70 hips) | p value |
|---|---|---|---|
| Acetabular opening angle | |||
| Acetabular anteversion angle (°) | 21 (6.7; 11–37) | 25 (5.5; 10–37) | < 0.014 |
| Acetabular inclination angle (°) | 39 (3.2; 33–46) | 49 (3.8; 38–61) | < 0.001 |
| Cranial anteversion angle (°) | 12 (8.6; −8.4 to 27) | 11 (8.8; −6.8 to 31) | 0.537 |
| Acetabular coverage | |||
| Anterior acetabular sector angle (°) | 57 (9.4; 38–74) | 42 (6.9; 27–55) | < 0.001 |
| Superior acetabular sector angle (°) | 123 (4.6; 115–133) | 99 (6.9; 87–114) | < 0.001 |
| Posterior acetabular sector angle (°) | 99 (7; 80–112) | 91 (6.8; 71–107) | < 0.001 |
| Axial acetabular sector angle (°) | 156 (9.9; 137–176) | 133 (8.5; 112–153) | < 0.001 |
| Acetabular depth | |||
| Coronal acetabular depth ratio (%) | 300 (29; 243–361) | 226 (40; 140–317) | < 0.001 |
| Axial acetabular depth ratio (%) | 441 (32; 378–519) | 404 (39; 296–492) | < 0.001 |
| Innominate rotation angles | < 0.001 | ||
| Superior iliac angle (°) | 52 (6.5; 39–679) | 58 (6.1; 45–68) | < 0.001 |
| Inferior iliac angle (°) | 70 (5.2; 61–82) | 71 (4.1; 62–82) | 0.028 |
| Ischiopubic angle (°) | 28 (2.7; 22–34) | 30 (2.8; 22–39) | < 0.001 |
| Acetabular floor to ischial wall distance (mm) | 0.6 (3.0; −5.1 to 5.9) | 0.6 (2.4; −5.0 to 5.6) | 0.917 |
Values are presented as mean (SD; range).