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Radiographic measurements obtained from anteroposterior pelvic radiographs
| Radiographic measurement | Value | Range |
|---|---|---|
| Femoral head diameter (mm) | 66 | 47–94 |
| Acetabular length (mm) | 80 | 56–107 |
| Crossover sign length (mm) | 21 | 4–46 |
| Percentage of retroverted acetabulum | 25 | 5–63 |
| Prominence of ischial spine 1 (mm) | 6.7 | 1–18.5 |
| Prominence of ischial spine 2 (mm) | 14 | 4–27 |
