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Table 2 Prevalence of acetabular dysplasia cases, by each parameter in three planes

From: Multiplanar evaluation of radiological findings associated with acetabular dysplasia and investigation of its prevalence in an Asian population: a CT-based study

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
  1. 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