The minimal clinically important difference for the nonarthritic hip score at 2-years following hip arthroscopy

• Published in: Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA Vol. 30; no. 7; pp. 2419 - 2423
• Main Authors: Bloom, David A., Kaplan, Daniel J., Kirby, David J., Buchalter, Daniel B., Lin, Charles C., Fried, Jordan W., Chintalapudi, Nainisha, Youm, Thomas
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2022; John Wiley & Sons, Inc
• Subjects: Arthroscopy; Body mass; Body mass index; Body size; Demographics; Hip; Medicine; Medicine & Public Health; Orthopedics; Patients; Sports Medicine; Surgery; Arthroscopy; MCID; Orthopedics; NAHS; Hip; FAI; Sports
• ISSN: 0942-2056; 1433-7347; 1433-7347
• DOI: 10.1007/s00167-021-06756-9

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/m 2 . 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.