Table 4.
Summary of radiographic parameters by group
| Parameter | Number of observations | Mean (degrees) | SD (degrees) | Median (degrees) | 25% Percentile | 75% Percentile |
|---|---|---|---|---|---|---|
| Acetabular roof angle | ||||||
| Impingement | 18 | 13 | 4 | 13 | 11 | 16 |
| Dysplasia | 21 | 19 | 7 | 17 | 15 | 23 |
| Neck-shaft angle | ||||||
| Impingement | 18 | 135 | 6 | 134 | 132 | 140 |
| Dysplasia | 21 | 141 | 9 | 141 | 133 | 147 |
| LCEA | ||||||
| Impingement | 18 | 20 | 3 | 21 | 19 | 22 |
| Dysplasia | 21 | 14 | 8 | 17 | 10 | 19 |
| Iliocapsularis volume | ||||||
| Impingement | 16 | 144 | 62 | 136 | 94 | 183 |
| Dysplasia | 15 | 145 | 29 | 144 | 125 | 162 |
| FEAR index | ||||||
| Impingement | 18 | −2 | 8 | 0.5 | −9.0 | 4 |
| Dysplasia | 20 | 13 | 15 | 10 | 6 | 16 |
LCEA = lateral center-edge angle; FEAR = Femoro-Epiphyseal Acetabular Roof.