Table 4.
Prevalence of femoroacetabular impingement reported in the literature
| Study | Year | Country | Study population | Prevalence of FAI, based on: | Radiographic modality and FAI findings | |
|---|---|---|---|---|---|---|
| Positive impingement test | Radiographic cam findings | |||||
| Gosvig et al. [14] | 2008 | Denmark | 3202 (M = 1184, F = 2018) | M = 17%, F = 4%, age range, 22–93 years | Standardized AP pelvic radiographs, alpha angle, and triangular index | |
| Hack et al. [16] | 2010 | Canada | 200 (M = 89, F = 111); mean age, 29 years (range, 21–51 years) | At least one hip, 1.5% (M + F) | 14% (M + F) (10.5% unilateral, 3.5% bilateral) M = 25%, F = 5% | MRI, alpha angle |
| Reichenbach et al. [41] | 2010 | Switzerland | M = 244; mean age, 20 years | M = 24% | MRI, scoring system for grading the maximum offset of the head-neck junction | |
| Jung et al. [22] | 2011 | USA | 380 (M = 108, F = 272); M = mean age, 63 years (range, 27–93 years), F = 60 years (range, 26–91 years) |
M: pathological (≥ 83°): 14%, borderline (6–82°): 15%; F: pathological (≥ 57°): 6%; borderline (51–56°): 6% |
AP pelvic CT scout, alpha angle | |
| Laborie et al. [24] | 2011 | Norway | 2060 (M = 868, F = 1192); mean age, 19 years (range, 17–20 years) | At least one hip, M = 35%, F = 10%; M = 25%, F = 6% |
Standardized AP and frog-leg pelvic radiograph, subjective evaluation of cam type | |
| Current study | 2012 | Norway | 1152* (M = 480, F = 672); mean age, 19 years (SD 0.4). | At least one hip: M = 7.3%, F = 4.8% Bilaterally: M = 2.9%, F = 1.2% |
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FAI = femoroacetabular impingement; * these 1152 were included in the study by Laborie et al. [24].