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FP3.2 The Impact of Femoral Version on the Outcomes of Hip Arthroscopic Surgery for Femoroacetabular Impingement: Results of a Multicenter Prospective Cohort Study
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FP3.2 The Impact of Femoral Version on the Outcomes of Hip Arthroscopic Surgery for Femoroacetabular Impingement: Results of a Multicenter Prospective Cohort Study

Jeffrey Nepple, Vivek Shah, Robert Westermann, Andrea Spiker, Bruce Levy, Aaron Krych, Yi-Meng Yen, ANCHOR Study Group and John C Clohisy
Journal of hip preservation surgery, Vol.12(Supplement_2), pp.ii5-ii6
12/01/2025
DOI: 10.1093/jhps/hnaf069.015
PMCID: PMC12720766
url
https://doi.org/10.1093/jhps/hnaf069.015View
Published (Version of record) Open Access

Abstract

Background Femoral version plays a critical role in pre-arthritic hip pain, particularly in femoroacetabular impingement (FAI). Variations in femoral version may contribute to hip instability or impingement. This study examines the outcomes of hip arthroscopy for FAI across different femoral version groups. Methods A prospective multicenter cohort of 677 FAI patients undergoing primary hip arthroscopy was collected, with 603 patients in this study based on recorded femoral version. Inclusion criteria were patients aged 14-45 years with idiopathic FAI, while previous ipsilateral hip procedures, associated disorders, or Tönnis 2 or greater osteoarthritis were excluded. Femoral version was measured on low-dose computed tomography (CT) utilizing the Yoshioka oblique method and categorized into five subgroups: <5°, 6°-15°, 16°-25°, 26°-35°, 35°+. Patient-reported outcomes (PROs) were obtained at minimum one-year follow-up. The modified Harris hip score (mHHS) was assessed relative to minimal clinically important difference (MCID) of 8 and patient acceptable symptom state (PASS) of 74. Additional PROs included HOOS Pain and Sports/Recreation subscores and iHOT-12 score. Composite failure was defined as reoperation for persistent symptoms or failure to achieve either the mHHS MCID or PASS. Results Males had statistically lower femoral version than females (14.0 vs 18.0; p<0.001). In females, 38.0% had a femoral version of 16°-25°, 17.9% between 26°-35°, and 3.6% greater than 35°, compared to 27.6%, 9.2%, and 1.8% in males, respectively (all p<0.001). Increased or decreased femoral versions appear to have similar outcomes to normal version. The mildly increased femoral anteversion groups of 16°-25° and 26°-35° demonstrated the best outcomes with changes in HOOS pain and sports subscores being significantly higher. Severely increased femoral anteversion, >35°, only present in 2.8% of patients, demonstrated a higher composite failure rate (15.4%) compared to moderately increased, 26°-35°, femoral version (3.1%). The decreased femoral version group, ≤5°, had a composite failure of 10.4% compared to normal femoral version, 16°-25° (10.2%). Conclusions The general anatomy differences between males and females lends males to be more in retroversion while females tend to be more anteverted. Overall, outcomes did not seem to differ between increased or decreased femoral versions but were superior at mildly increased femoral versions.
 Females Patients

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