Poster 232: Clinical Outcomes Among Individuals with Global Acetabular Retroversion who Underwent Hip Arthroscopy for FAI with Minimum 5-Year Follow-Up

Objectives: The purpose of this study was to compare functional outcomes and clinical threshold achievement rates patients with radiographic signs global acetabular retroversion who underwent hip arthroscopy for FAI minimum follow-up 5 years. Methods: Patients were identified from a single-surgeon prospectively-collected database primary treatment FAI. completed patient-reported outcome (PRO) surveys at both baseline 5-year follow-up. Demographic data collected including age, sex, BMI time surgery, symptom length. Intraoperative findings recorded, the Outerbridge grade, presence labral tears, chondral delamination, subspine impingement, cam lesions, pincer mixed-type Global assessed on AP view using three signs: ischial spine, posterior wall, crossover signs. Other measures included alpha angle measured (AP, 45° Dunn, 90° Dunn), lateral center edge (LCEA), Tönnis grade. Results: We 124 had adequate imaging complete PROs. Preoperative X-rays demonstrated spine sign in 65 (52.4%), wall 61 (49.2%), 75 (60.5%). Mean highest (62.2°), followed by Dunn (55.9°) (50.9°) mean LCEA 38.5°. A comparison no significant differences between groups BMI, preoperative length, mHHS or NAHS (p>0.05). At follow-up, reported improvement (mean 50.4 82.7, p<0.001) (49.4 85.5, p<0.001). Achievement high MCID (90.3%), SCB (80.7%), PASS (79.0%) mHHS. Three-way frequency found that all tended be present together (40 patients, 32.3%) absent (31 25.0%). Pairwise comparisons tetrachoric correlation testing significantly correlated one another: versus (rtet=0.65, corrected p<0.001), (rtet=0.74, (rtet=0.51, Multivariable analysis did not find any independent predictors Posterior associated lower odds achieving (OR = 0.62, 95% CI [0.06 1.09]) but achieve significance (χ 2 =3.39, p=0.07). Overall, MCID, SCB, differ cohorts respect each Conclusions: Clinical among based mHHS, NAHS, PASS. Surgeons should reassured these regain function rate similar greater population.