Leg dominance as a risk factor for femoroacetabular impingement syndrome.

We read with great interest the article by Matthew Philippi Clinton et al. in your journal regarding the impact of leg dominance on femoroacetabular impingement syndrome (FAIS) [1]. In this article, the authors performed a retrospective study to investigate whether the dominant lower extremity (kicking leg) would have higher rates of cam-type FAIS leading to hip arthroscopy. The results indicated that patients were more likely to undergo arthroscopic treatment for FAIS on their dominant leg. We appreciate the tremendous work by the authors. However, certain points in this paper are suggested to be noted to the readers.

As the current study aims to investigate the role of limb dominance as an etiological factor for FAIS, the results of multivariable logistic regression analysis are suggested to be shown with the odds ratio and P-value to indicate further that leg dominance is an independent risk factor for FAIS when other variables are adjusted.

Another concern is about the patient characteristics. The patient characteristics included in this study are relatively simple. Is leg predominance related to the occupation, life style or patient history? These factors are suggested to be collected, and the patients might be stratified based on these variables to show the interaction between the subgroups, which might be helpful in consolidating the conclusion in a specific group of patients. Additionally, the dominant leg might be different when dealing with various tasks [2].

Once again, we greatly appreciate this work, indicating leg dominance was associated with cam-type FAIS requiring arthroscopic hip surgery. The aforementioned issues are suggested to be considered and discussed.