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Combined Borderline Acetabular Dysplasia and Increased Femoral Anteversion Is Associated With Worse Outcomes in Female Patients Undergoing Hip Arthroscopy for Femoroacetabular Impingement

Published:November 01, 2022DOI:https://doi.org/10.1016/j.arthro.2022.10.028

      Purpose

      To determine the relationship of increased femoral anteversion and borderline acetabular dysplasia on the outcomes of hip arthroscopy for femoroacetabular impingement in a female cohort of patients.

      Methods

      This is a retrospective study of female patients undergoing hip arthroscopy for femoroacetabular impingement. All patients had preoperative radiographs and computed tomography scans from which lateral center edge angle (LCEA) and femoral anteversion were measured. Patient outcome was quantified by preoperative and postoperative International Hip Outcome Tool 12-item instrument (iHOT-12). All patients had follow-up at 2 to 4 years postoperatively. Published values for minimum clinically important difference, substantial clinical benefit (SCB), patient acceptable symptomatic state (PASS), and a normal or abnormal hip were used to determine outcome as well as the final score and delta of the iHOT-12.

      Results

      There were 243 female patients included in the cohort (83% follow-up) who had iHOT-12 scores at 2- to 4-year follow-up (mean 36.9 months). Female patients with combined LCEA ≤25° and femoral anteversion >20° had lower final IHOT-12 scores (P = .001) and delta iHOT-12 (P = .010) and were less likely to achieve a normal hip (P = .013), minimum clinically important difference (P = .018), SCB (P < .001), or PASS (P < .001) and more likely to have an abnormal hip (P = .002). In addition, patients with an LCEA ≤25° and normal femoral version were less likely to achieve a normal hip (P = .013), SCB (P < .001), and PASS (P < .001) compared with those with normal acetabular coverage (all P < .05). There was no difference in these outcome measures between the groups with an LCEA >25° with or without increased femoral version.

      Conclusions

      Female patients with femoral anteversion >20° and borderline acetabular dysplasia did poorly after hip arthroscopy. However, those with increased femoral anteversion and normal acetabular coverage had outcomes similar to control hips.

      Level of Evidence

      Level IV, case series.
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