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Background:   Femoral retroversion has been noted as a possible risk factor for poor clinical results after hip arthroscopic surgery.Purpose:   To compare the outcomes of the arthroscopic treatment of hip abnormalities in patients with femoral retroversion to patients with femoral anteversion between 10° and 20°.Study Design:   Cohort study; Level of evidence, 3.Methods:   Between November 2011 and September 2013, 790 hip arthroscopic procedures were performed at a single institution. Of these, 59 hips (7.5%) were located in patients with femoral version ≤0°, calculated using preoperative magnetic resonance imaging. These patients were pair matched, based on body mass index ±5 kg/m 2 , age ±5 years, and Tönnis grade, with 59 patients with femoral anteversion between 10° and 20°. Exclusion criteria included Perthes disease, inflammatory arthritis, slipped capital femoral epiphysis, previous hip surgery, abductor repair, lateral center-edge angle  1, and acetabular profunda or protrusio. Patient-reported outcomes (PROs) were recorded preoperatively, at 3 months postoperatively, and annually thereafter. The PROs utilized were the modified Harris Hip Score (mHHS), Non-Arthritic Hip Score (NAHS), and Hip Outcome Score–Sports-Specific Subscale (HOS-SSS). The visual analog scale (VAS) was collected to assess the patients’ pain; patient satisfaction scores (0-10) were also collected. Radiographs were collected at the above time intervals as well.Results:   Two patients from the control group and 1 patient from the retroverted group required total hip arthroplasty at a mean 19.5 and 26.3 months, respectively. Both groups demonstrated significant improvement from their preoperative state in all PRO and VAS scores ( P &lt; .001). No differences in preoperative, postoperative, or change in PRO and VAS scores between the groups were noted.Conclusion:   Patients with femoral retroversion reported similar outcomes compared to patients with normal femoral version when undergoing hip arthroscopic surgery. Both groups had similar improvements from the preoperative state.

Clinical Outcomes of Hip Arthroscopic Surgery in Patients With Femoral Retroversion: A Matched Study to Patients With Normal Femoral Anteversion