The Severity of Acetabular Retroversion Does Not Influence Outcomes of Arthroscopic Management of FAI

Objectives: Controversy exists regarding optimal treatment of FAI in the setting of acetabular retroversion. The purpose of this study was to investigate changes in pain and function among patients with acetabular retroversion treated with hip arthroscopy. Secondarily, to assess if the severity of posterior wall deficiency influences post-operative outcomes following hip arthroscopy. Methods: A retrospective review of patients with acetabular retroversion with hip arthroscopic surgery at a single institution was performed. Acetabular retroversion was defined by three radiographic criteria: the presence of crossover sign, ischial spine sign, and posterior wall sign. Anteroposterior radiographs were used to measure lateral center edge angle (LCEA), Tonnis grade, anterior wall index (AWI) and posterior wall index (PWI), and alpha angle. Patient-reported outcome (PROs) included modified Harris Hip Score (MHHS), visual analog scale (VAS) and quality of life with Veterans RAND-12 (VR-12). Spearman correlation coefficients were used to determine correlation of PWI with pre- and post-PROs. Multivariate analysis was performed and generalized estimating equation was used to determine independent predictors for outcome scores. Significance was set at p