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Distribution of impingement, normal, and instability anatomy
| Parameter | Number of hips | ||
|---|---|---|---|
| Impingement | Normal | Instability | |
| Lateral center-edge angle (n = 112) | > 35° | 20°–35° | < 20° |
| 19 (17%) | 88 (78%) | 5 (5%) | |
| Neck-shaft angle (n = 112) | < 125° | 125°–140° | > 140° |
| 18 (16%) | 89 (79%) | 5 (5%) | |
| Acetabular version (n = 112) | < 15° | 15°–20° | > 20° |
| 51 (46%) | 45 (40%) | 16 (14%) | |
| Femoral version (n = 108) | < 15° | 15°–20° | > 20° |
| 43 (40%) | 30 (28%) | 35 (32%) | |
| Alpha angle (n = 112) | > 55° | < 55° | |
| 90 (80%) | 22 (20%) | ||
