Table 3.
Detail evaluations for cam impingement deformities
| Variables | Number of hipsa | Age of patientsb (years) | ||||
|---|---|---|---|---|---|---|
| Female | Male | Overall | Female | Male | Overall | |
| Pistol grip deformity (total 36 hips) | ||||||
| Primary | 6 (6.8%) | 8 (9.1%) | 14 (15.9%) | 74.0 ± 3.8c | 76.4 ± 4.7d | 75.8 ± 4.2d |
| Reactive | 19 (21.6%) | 3 (3.4%) | 22 (25.0%) | 68.2 ± 8.4 | 69.0 ± 3.6 | 68.3 ± 7.9 |
| Alpha angle > 50 (total 62 hips) | ||||||
| Primary | 11 (12.5%) | 6 (6.8%) | 17 (19.3%) | 71.4 ± 10.6 | 77.0 ± 6.2e | 73.4 ± 9.4 |
| Reactive | 38 (43.2%) | 7 (8.0%) | 45 (51.1%) | 71.1 ± 8.8 | 80.2 ± 10.3 | 70.8 ± 9.0 |
| Cam impingement (primary pistol grip deformity and/or alpha angle > 50)f | ||||||
| 12 (13.6%) | 7 (8.0%) | 19 (21.6%) | 71.5 ± 10.1 | 76.6 ± 5.7 | 73.4 ± 8.9 | |
aThe values are expressed as the number and percent of patients who were categorized with positive radiographic parameters
bThe values are expressed as age in years and the standard deviation
cA significant difference (p < 0.001) was shown between primary deformity and reactive osteophyte within males
dA significant difference (p < 0.05) was shown between primary deformity and reactive osteophyte within the same gender group
eA significant difference (p < 0.001) was shown between primary deformity and reactive osteophyte among males, and between males and females within primary deformity
fThe percentage of patients with an unknown etiology (88 hips)