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Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes

BACKGROUND: Radiographic findings related to the cam and pincer variants of femoroacetabular impingement (FAI) include measurements of the alpha angle and lateral center-edge angle (LCEA). The function of these radiographic findings has been put into question because of high heterogeneity in reporte...

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Autores principales: Morales-Avalos, Rodolfo, Tapia-Náñez, Adriana, Simental-Mendía, Mario, Elizondo-Riojas, Guillermo, Morcos-Sandino, Michelle, Tey-Pons, Marc, Peña-Martínez, Víctor M., Barrera, Francisco J., Guzman-Lopez, Santos, Elizondo-Omaña, Rodrigo E., Vílchez-Cavazos, Félix
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7874354/
https://www.ncbi.nlm.nih.gov/pubmed/33614808
http://dx.doi.org/10.1177/2325967120977892
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author Morales-Avalos, Rodolfo
Tapia-Náñez, Adriana
Simental-Mendía, Mario
Elizondo-Riojas, Guillermo
Morcos-Sandino, Michelle
Tey-Pons, Marc
Peña-Martínez, Víctor M.
Barrera, Francisco J.
Guzman-Lopez, Santos
Elizondo-Omaña, Rodrigo E.
Vílchez-Cavazos, Félix
author_facet Morales-Avalos, Rodolfo
Tapia-Náñez, Adriana
Simental-Mendía, Mario
Elizondo-Riojas, Guillermo
Morcos-Sandino, Michelle
Tey-Pons, Marc
Peña-Martínez, Víctor M.
Barrera, Francisco J.
Guzman-Lopez, Santos
Elizondo-Omaña, Rodrigo E.
Vílchez-Cavazos, Félix
author_sort Morales-Avalos, Rodolfo
collection PubMed
description BACKGROUND: Radiographic findings related to the cam and pincer variants of femoroacetabular impingement (FAI) include measurements of the alpha angle and lateral center-edge angle (LCEA). The function of these radiographic findings has been put into question because of high heterogeneity in reported studies. PURPOSE: The aim of this study was 3-fold: (1) to determine the prevalence of cam and pincer variants according to sex and age on anteroposterior (AP) pelvic radiographs from an asymptomatic nonathletic population, (2) to identify the most common radiographic signs of cam- and pincer-type variants, and (3) to determine if there are variations in the prevalence of these radiographic signs according to sex and age. STUDY DESIGN: Cross-sectional study; Level of evidence, 3. METHODS: There were 3 independent observers who retrospectively analyzed the 939 AP pelvic radiographs (1878 hips) of patients aged 18 to 50 years who did not have hip symptoms and who were not professional athletes. The prevalence of the cam and pincer variants according to the alpha angle and LCEA, respectively, and the presence of other radiographic signs commonly associated with these variables were determined in the overall population and by subgroup according to sex and age group (18-30, 31-40, and 41-50 years). Descriptive and inferential statistics were used to analyze the study sample. RESULTS: The mean age of the included population was 31.0 ± 9.2 years, and 68.2% were male. The prevalence of the cam-type variant was 29.7% (558/1878), and that of the pincer-type variant was 24.3% (456/1878). The radiographic signs that were most associated with the cam and pincer variants were a pistol-grip deformity and the crossover sign, respectively. Significant differences (P < .001) in the prevalence of these variants were identified between men and women in both variants. No differences were observed in the alpha angle or LCEA according to sex or age. CONCLUSION: Radiographic findings suggestive of FAI had significant variations with respect to sex and age in this study sample. This study provides information to determine the prevalence of these anatomic variants in the general population.
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spelling pubmed-78743542021-02-19 Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes Morales-Avalos, Rodolfo Tapia-Náñez, Adriana Simental-Mendía, Mario Elizondo-Riojas, Guillermo Morcos-Sandino, Michelle Tey-Pons, Marc Peña-Martínez, Víctor M. Barrera, Francisco J. Guzman-Lopez, Santos Elizondo-Omaña, Rodrigo E. Vílchez-Cavazos, Félix Orthop J Sports Med Article BACKGROUND: Radiographic findings related to the cam and pincer variants of femoroacetabular impingement (FAI) include measurements of the alpha angle and lateral center-edge angle (LCEA). The function of these radiographic findings has been put into question because of high heterogeneity in reported studies. PURPOSE: The aim of this study was 3-fold: (1) to determine the prevalence of cam and pincer variants according to sex and age on anteroposterior (AP) pelvic radiographs from an asymptomatic nonathletic population, (2) to identify the most common radiographic signs of cam- and pincer-type variants, and (3) to determine if there are variations in the prevalence of these radiographic signs according to sex and age. STUDY DESIGN: Cross-sectional study; Level of evidence, 3. METHODS: There were 3 independent observers who retrospectively analyzed the 939 AP pelvic radiographs (1878 hips) of patients aged 18 to 50 years who did not have hip symptoms and who were not professional athletes. The prevalence of the cam and pincer variants according to the alpha angle and LCEA, respectively, and the presence of other radiographic signs commonly associated with these variables were determined in the overall population and by subgroup according to sex and age group (18-30, 31-40, and 41-50 years). Descriptive and inferential statistics were used to analyze the study sample. RESULTS: The mean age of the included population was 31.0 ± 9.2 years, and 68.2% were male. The prevalence of the cam-type variant was 29.7% (558/1878), and that of the pincer-type variant was 24.3% (456/1878). The radiographic signs that were most associated with the cam and pincer variants were a pistol-grip deformity and the crossover sign, respectively. Significant differences (P < .001) in the prevalence of these variants were identified between men and women in both variants. No differences were observed in the alpha angle or LCEA according to sex or age. CONCLUSION: Radiographic findings suggestive of FAI had significant variations with respect to sex and age in this study sample. This study provides information to determine the prevalence of these anatomic variants in the general population. SAGE Publications 2021-02-05 /pmc/articles/PMC7874354/ /pubmed/33614808 http://dx.doi.org/10.1177/2325967120977892 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by-nc-nd/4.0/ This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (https://creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Article
Morales-Avalos, Rodolfo
Tapia-Náñez, Adriana
Simental-Mendía, Mario
Elizondo-Riojas, Guillermo
Morcos-Sandino, Michelle
Tey-Pons, Marc
Peña-Martínez, Víctor M.
Barrera, Francisco J.
Guzman-Lopez, Santos
Elizondo-Omaña, Rodrigo E.
Vílchez-Cavazos, Félix
Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes
title Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes
title_full Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes
title_fullStr Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes
title_full_unstemmed Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes
title_short Prevalence of Morphological Variations Associated With Femoroacetabular Impingement According to Age and Sex: A Study of 1878 Asymptomatic Hips in Nonprofessional Athletes
title_sort prevalence of morphological variations associated with femoroacetabular impingement according to age and sex: a study of 1878 asymptomatic hips in nonprofessional athletes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7874354/
https://www.ncbi.nlm.nih.gov/pubmed/33614808
http://dx.doi.org/10.1177/2325967120977892
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