Table 2.
Prevalence of acetabular dysplasia cases, by each parameter in three planes
| Definition of AD | All subjects (n = 52) | Males (n = 29) | Females (n = 23) | P value* |
|---|---|---|---|---|
| Coronal plane | ||||
| CE angle <20° | 11.5% (6/52) (95% CI: 5.4–23.0%) |
10.3% (3/29) (95% CI: 3.6–26.4%) |
13.0% (3/23) (95% CI: 4.5–32.1%) |
0.762 |
| Sharp angle >45° | 17.3% (9/52) (95% CI: 9.4–29.7%) |
13.8% (4/29) (95% CI: 5.5–26.3%) |
21.7% (5/23) (95% CI: 9.7–41.9%) |
0.452 |
| Acetabular index >14° | 17.3% (9/52) (95% CI: 9.4–29.7%) |
17.2% (5/29) (95% CI: 7.6–34.5%) |
17.4% (4/23) (95% CI: 7.0–37.1%) |
0.989 |
| ADR <250 | 23.1% (12/52) (95% CI: 13.7–36.1%) |
17.2% (5/29) (95% CI: 7.6–34.5%) |
30.4% (7/23) (95% CI: 15.6–50.9%) |
0.262 |
| AHI <75% | 15.4% (8/52) (95% CI: 8.0–27.5%) |
17.2% (5/29) (95% CI: 7.6–34.5%) |
13.0% (3/23) (95% CI: 4.5–32.1%) |
0.677 |
| Axial plane | ||||
| AASA <50° | 17.3% (9/52) (95% CI: 9.4–29.7%) |
6.9% (2/29) (95% CI: 1.9–22.0%) |
30.4% (7/23) (95% CI: 15.6–50.9%) |
0.026 |
| PASA <90° | 13.5% (7/52) (95% CI: 6.7–25.3%) |
20.7% (6/29) (95% CI: 9.8–38.4%) |
4.3% (1/23) (95% CI: 0.8–21.0%) |
0.086 |
| Sagittal plane | ||||
| VCA angle <20° | 7.7% (4/52) (95% CI: 3.0–18.2%) |
3.4% (1/29) (95% CI: 0.6–17.2%) |
13.0% (3/23) (95% CI: 4.5–32.1%) |
0.197 |
AD acetabular dysplasia, CE center edge, ADR acetabular depth ratio, AHI acetabulum head index, AASA anterior acetabular sector angle, PASA posterior acetabular sector angle, VCA vertical-center-anterior margin angle. *Male vs female subjects, evaluated with a χ 2 test. P values < 0.05 were considered statistically significant