FP6.4 Young Adults With Normal Body Mass Index Demonstrate Greater Than 95% Survivorship at 10 Years Following Hip Arthroscopy for Femoroacetabular Impingement Syndrome

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ID: 331367
2026
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Abstract
Abstract ICLA06 - Finetuning FAI Surgery: Advanced Corrections and Avoiding Yatrogenic Instability, Auditorium A (BMCC Level 1), October 8, 2026, 14:00 - 16:00 Background Hip arthroscopy for femoroacetabular impingement syndrome (FAIS) has demonstrated favorable short- and mid-term outcomes, yet long-term survivorship data in young adults are limited. Body mass index (BMI) has been identified as a potential modifier of outcomes, but its effect on 10-year joint preservation in this population has not been established. This study compared 10-year survivorship, patient-reported outcomes (PROs), and clinically meaningful improvement between normal-weight (BMI <25) and overweight/obese (BMI ≥25) young adults following primary hip arthroscopy for FAIS. Methods Patients aged 18-40 who underwent primary hip arthroscopy for FAIS (2007–2012) were stratified by BMI (<25 vs ≥25 kg/m2). PROs were assessed using the modified Harris Hip Score (mHHS) and Non-Arthritic Hip Score (NAHS), with MCID, PASS, and SCB evaluated at 10 years. Survivorship was compared using Kaplan-Meier analysis with log-rank testing. Multivariate logistic and linear regression evaluated the independent effect of BMI group on failure and 10-year PROs. Results Seventy-eight patients were included (BMI <25: n = 45; BMI ≥25: n = 33) with 97.5% 10-year PRO follow-up. Groups were similar in sex, Tönnis grade, and baseline PROs. Normal-weight young adults demonstrated 95.6% survivorship at 10 years, with only 2 of 45 patients (4.4%) requiring reoperation. By comparison, the elevated BMI group had significantly lower survivorship (72.7%; log-rank p = 0.005), with BMI ≥25 independently predicting failure on multivariate analysis (OR 6.78; 95% CI, 1.43-49.46; p = 0.027). Normal-weight patients achieved 10-year mHHS of 90.5 ± 12.1 and NAHS of 88.8 ± 13.1, with MCID achievement of 95.6% for both scores and PASS achievement of 73.3% for both scores. The elevated BMI group had significantly lower 10-year mHHS (80.9, p = 0.007) and NAHS (79.9, p = 0.029), with BMI ≥25 remaining an independent predictor of inferior PROs on multivariate linear regression (p < 0.05 for both). In a secondary analysis, obese patients (BMI ≥30, n = 11) demonstrated even greater deficits (mHHS 69.3 vs 89.4, p = 0.009). Conclusion Normal-weight young adults who undergo hip arthroscopy for FAIS can expect greater than 95% joint survivorship at 10 years, with high rates of clinically meaningful functional improvement. These results compare favorably with long-term survivorship reported for other common joint-preserving procedures in young patients. Elevated BMI is independently associated with nearly 7-fold higher odds of failure and significantly lower functional outcomes, highlighting the importance of weight optimization as a modifiable factor in preoperative counseling.
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Authors Layne Estes, Samy Shelbaya, Mallory Ehlers, Pasquale Gencarelli, Spencer Stein, Thomas J. Youm
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Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.044
URL
https://doi.org/10.1093/jhps/hnag043.044
Keywords Keywords not found

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