Table 3.
Acetabular parameters by acetabular dysplasia subtype
| Radiographic parameter | Total (n = 50) |
Anterosuperior deficiency (n = 15) |
Global deficiency (n = 18) |
Posterosuperior deficiency (n = 17) |
p value |
|---|---|---|---|---|---|
| Crossover sign | 13/50 (26%) | 1/15 (7%) | 4/18 (22%) | 8/17 (47%) | 0.031 |
| Posterior wall sign | 26/50 (52%) | 3/15 (20%) | 8/18 (44%) | 15/17 (88%) | < 0.001 |
| Acetabular version at clockface position | |||||
| 1:00 | 5° | 10° ± 6° | 5° ± 7° | −1° ± 6° | < 0.001 |
| 2:00 | 10° | 15° ± 3° | 10° ± 3° | 5° ± 4° | < 0.001 |
| 3:00 | 18° | 22° ± 3° | 18° ± 3° | 14° ± 3° | < 0.001 |
| Femoral version | 19° | 21° ± 10° | 17° ± 14° | 20° ± 14° | 0.607 |
| < 5° | 19/50 (38%) | 5/15 (33%) | 9/18 (50%) | 5/17 (29%) | 0.524 |
| 5°–20° | 14/50 (28%) | 6/15 (40%) | 3/18 (17%) | 5/17 (29%) | |
| > 20° | 17/50 (34%) | 4/15 (27%) | 6/18 (33%) | 7/17 (41%) |