Table I.
Pre-operative patient demographics along with associated clinical and imaging findings (IR = Internal Rotation; ER = External Rotation; CEA = Lateral Center-Edge Angle)
| Patient demographics | Age at surgery (years) | 29 (r : 17–45) |
| Gender | 5 male (17%) | |
| 24 female (83%) | ||
| Laterality | 18 right; | |
| 7 left; | ||
| 4 bilateral | ||
| Femoral anteversion angle (degrees) | –3.1 (r: –21 to 4) | |
| Previous hip arthroscopy | 3/33 cases | |
| Pre-operative clinical findings | Positive hip impingement sign | 33/33 cases |
| Hip IR (degrees) | 6.7 (r: 0–15) | |
| Hip ER (degrees) | 70.6 (r: 45–90) | |
| Pre-operative X-ray | Tonnis grade 0 | 33/33 cases |
| CEA (degrees) | Mean 31.8 (r: 18–47); | |
| 1 patient (2 hip cases) <25 | ||
| Alpha angle (degrees) | Mean 50.6 (r: 38–72); | |
| 14/33 cases ≥ 50 | ||
| Pre-operative MRI | Presence of labral pathology | 25/33 hips (76%) |
| Articular degeneration | Mild: 6 hips (18%); | |
| Moderate: 1 hip |