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The minimal clinically important difference for the nonarthritic hip score at 2-years following hip arthroscopy
David A Bloom1, Daniel J Kaplan2, David J Kirby2
1NYU Langone Orthopedics, 333 East 38th Street, 4th Floor, New York, NY, 10016, USA. bloom.davida@gmail.com.
Purpose:
The purpose of this study was to determine and establish the MCID for the NAHS at 2 years in patients undergoing hip arthroscopy for femoroacetabular impingement syndrome (FAIS).
Methods:
Patients that underwent primary hip arthroscopy for FAIS between 2010 and 2016 were analyzed for eligibility. Data were collected from a single surgeon's hip arthroscopy database. MCID was calculated for the NAHS utilizing a distribution-based method.
Results:
The study included 298 patients (184 females) with an average age of 40.4 ± 13.0 years and average body mass index (BMI) of 25.7 ± 4.2 kg/m2. At baseline, the cohort's average NAHS score was 48.7 ± 13.6 and demonstrated an improvement of 36.5 ± 17.0 for NAHS at follow-up. This resulted in MCID values of + 8.5 for NAHS.
Conclusion:
This is the first study to report the MCID (+ 8.5) for NAHS following primary hip arthroscopy, and as such, is a valuable contribution to future hip arthroscopy research.
Level Of Evidence:
IV.
