Arthroscopy: The Journal of Arthroscopic & Related Surgery
Systematic ReviewPrevalence of Femoroacetabular Impingement Imaging Findings in Asymptomatic Volunteers: A Systematic Review
Section snippets
Methods
A systematic review was performed using Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines with a PRISMA checklist.9 Three independent reviewers (one board-eligible orthopaedic surgeon in sports medicine fellowship training and 2 orthopaedic surgery residents) completed the search. The search was performed on April 13, 2013 using an explicit search algorithm: (((((hip[Title/Abstract])) AND (asymptomatic[Title/Abstract]))) AND ((((radiograph[Title/Abstract])
Results
Before screening, 237 studies were identified. After applying inclusion and exclusion criteria, 26 studies remained (Table 1). These comprised 2,114 asymptomatic hips (57.2% in men and 42.8% in women) with a mean overall age of 25.3 ± 1.5 years. Of the 2,114 asymptomatic hips analyzed, approximately 33% were in athletes (most commonly collegiate football players; n = 298), army recruits (n = 244), and hockey players (n = 127). The mean alpha angle (measured on MRI and radiography) in
Discussion
The purpose of this study was to determine the prevalence of FAI and labral tears in asymptomatic individuals. The authors hypothesized that the prevalence would be low. The hypothesis was partially confirmed. The prevalence of cam deformity was 37% and the prevalence of pincer deformity was 67%. Interestingly, there was an almost 3:1 ratio of cam deformity in the athletic population compared with the nonathletes. The prevalence of labral injury was 68%. These findings should be used to assist
Conclusions
FAI morphologic features and labral injuries are common in asymptomatic patients and may have an increased presence in athletes. Clinical decision making should carefully analyze the association of patient history and physical examination with radiographic imaging.
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See commentary on page 1205
The authors report the following potential conflict of interest or source of funding: S.N. receives support from Össur, Stryker, AlloSource, Arthrex, Athletico, DJ Orthopaedics, Linvatec, Miomed, and Smith & Nephew and M.S. receives support from Smith & Nephew and Linvatec.