Table IV.
The CT-based measurements and outcome parameters of the five study groups and of the control group. Level of significance was adjusted using the Bonferroni correction for six groups (0.05/6 = 0.008).
| Parameter | Cam FAI | Acetabular retroversion | Hip dysplasia | Total acetabular retroversion | High acetabular anteversion | Control group | p-value* |
|---|---|---|---|---|---|---|---|
| Hips, n (patients) | 32 (24) | 41 (33) | 47 (29) | 15 (9) | 20 (17) | 48 (27) | |
| Mean pelvic incidence, ° (SD; range) | 51 (7; 34 to 66)† ‡ | 42 (10; 24 to 67) | 55 (12; 25 to 75)† ‡ | 37 (7; 24 to 46) | 57 (11; 38 to 75)† ‡ | 51 (9; 32 to 72)† ‡ | < 0.001 |
| Mean pelvic tilt, ° (SD; range) | 8 (5; -1 to 19)† | 4 (5; -6 to 12) | 10 (6; -2 to 27)† ‡ | 4 (5; -6 to 10) | 11 (7; 2 to 27)† ‡ | 13 (7; 4 to 27)† ‡ | < 0.001 |
| Mean sacral slope, ° (SD; range) | 42 (7; 28 to 64) | 38 (9 ;16 to 58) | 44 (9; 19 to 60)† ‡ | 34 (9; 16 to 43) | 46 (8; 27 to 60)† ‡ | 38 (7; 26 to 54) | < 0.001 |
| Mean external iliac rotation, inferior iliac wing angle, ° (SD; range) | 24 (5; 14 to 32)† ‡ | 29 (4; 16 to 33) | 20 (5; 6 to 29)† ‡ | 31 (2; 26 to 33) | 19 (5; 6 to 28)† ‡ | 25 (5; 15 to 33)† ‡ | < 0.001 |
| Mean pelvic inclination, ° (SD; range) | 66 (5; 57 to 78) | 69 (5; 61 to 83) | 65 (7; 48 to 83) | 68 (5; 62 to 78) | 64 (7; 48 to 75) | 59 (7; 46 to 70)† ‡ | 0.038 |
| Mean acetabular version, ° (SD; range) | 18 (6; 8 to 30) | 10 (6; -2 to 25) | 22 (5; 9 to 36)† ‡ | 5 (4; -2 to 14) | 25 (5; 15 to 36)† ‡ | 18 (5; 8 to 26)† ‡ | < 0.001 |
| Mean APP angle, ° (SD; range) | 5 (5; -7 to 17) | 8 (5; -1 to 24) | 7 (6; -6 to 20) | 8 (6; -1 to 15) | 7 (7; -4 to 20) | 1 (7; -10 to 15) | 0.703 |
*
Analysis of variance.
†
Significant difference compared to hips with acetabular retroversion.
‡
Significant difference compared to hips with total acetabular retroversion.
APP, anterior pelvic plane; FAI, femoroacetabular impingement; SD, standard deviation.