Table III.
Results of mean FV and AV and prevalence analysis for FV and McKibbin index are shown
| Parameter | Overall study group | Patients treated surgically | Patients treated non-surgically | Overcoverage | Severe over-coverage | Retroverted acetabulum | Cam-type FAI | Mixed-type FAI |
|---|---|---|---|---|---|---|---|---|
| Number of hips (patients) | 384 (333) | 192 (170) | 192 (163) | 38 (33) | 46 (41) | 77 (65) | 165 (142) | 137 (118) |
| Femoral version (°) [24] | 16 ± 11 (−16–58) |
17 ± 11 (−15–58) |
16 ± 11 (−16–55) |
17 ± 14 (−16–58) |
20 ± 11 (−12–47) |
16 ± 11 (−4–48) |
15 ± 10 (−15–55) |
17 ± 11 (−13–46) |
| Central Acetabular version (°) | 18 ± 7 (−1–38) |
19 ± 7 (1–35) |
17 ± 7 (−1–35) |
20 ± 5 (5–29) |
19 ± 7 (6–35) |
13 ± 6 (−1–26) |
19 ± 6 (2–33) |
16 ± 7 (−1–33) |
| Cranial Acetabular version (°) | 16 ± 7 (−21–40) |
16 ± 10 (−21–40) |
16 ± 9 (−14–39) |
18 ± 8 (−9–33) |
20 ± 10 (−5–40) |
9 ± 10 (−21–28)* |
19 ± 8 (−8–35) |
14 ± 10 (−21–34) |
| McKibbin index (°) [47] | 34 ± 14 (−5–83) |
36 ± 14 (−5–80) |
33 ± 14 (−5–83) |
37 ± 17 (2–80) |
39 ± 14 (4–71) |
28 ± 13 (−1–72)* |
35 ± 13 (−5–83) |
32 ± 13 (−5–77) |
| Prevalence analysis | ||||||||
| McKibbin index 20–50° | 72% | 73% | 70% | 66% | 70% | 66% | 76% | 72% |
| McKibbin index <20 or >50° | 28% | 27% | 30% | 34% | 30% | 34% | 24% | 28% |
| Decreased FV <10° | 25% | 21% | 30% | 29%* | 11% | 31%* | 28%* | 23% |
| Increased FV >25° | 20% | 21% | 19% | 29% | 24% | 14% | 15% | 20% |
| Abnormal FV (<10° or >25°) | 45% | 42% | 49% | 58%* | 35% | 45% | 43% | 44% |
| Normal FV (10–25°) | 55% | 56% | 51% | 42%* | 65% | 55% | 57% | 56% |
Continuous values are expressed as mean ± SD with range in parentheses, level of significance was adjusted with a Bonferroni correction for five groups (0.05/5 = 0.01), FAI = femoroacetabular impingement.
*
Significant difference compared with severe overcoverage.