EP8.68 Patients Undergoing Hip Arthroscopy Demonstrate Improved Patient Reported Outcomes But Similar Hip Kinematics At 6-Month Follow-Up: A Pilot Study

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ID: 331101
2026
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Abstract
Abstract Purpose To determine whether changes in patient hip range of motion, measured by motion capture, from preoperative to 6-months postoperative status are associated with changes in patient reported outcome measures (PROMs). Methods Motion-capture, demographic, and PROM data were obtained pre-operation and 6 months post-operation from 5 patients with only one symptomatic hip. Patients performed 5 repetitions each of 14 movements: regular squat, sumo squat, seated figure 4, symptomatic single leg hop, both legs hop, sit-to-stand, lumbar flexion-extension, seated deep hip flexion, seated hip abduction, seated hip adduction, seated hip internal rotation, seated hip external rotation, seated hip deep flexion and internal rotation, seated hip deep flexion and external rotation. The following PROMs were analyzed: iHOT-12, Hip Outcome Score–SS, PROMIS Physical Function, PROMIS Pain Interference, PROMIS Depression, and PROMIS Anxiety. For motion capture collected with inertial measurement units (Movella, Xsens, El Segundo, CA, USA), an orthopedic sports surgeon identified the patient’s most optimal repetition of each movement which was used for analysis. Statistical parametric mapping (SPM) determined periods of the movement which were significantly different between preoperative and postoperative motion-capture. Normality tests determined whether parametric or non-parametric equivalent tests were appropriate to compare preoperative and postoperative PROMs and motion capture results. Results None of the SPM tests for any of the 14 movements demonstrated any difference between patients’ preoperative and 6-months postoperative range of motion (p>0.05). Nearly all PROMs demonstrated significantly improved scores: iHOT-12 (p=0.01), Hip Outcome Score–SS (p=0.0246), PROMIS Physical Function (p=0.0143), and PROMIS Depression (p=0.0479), except for PROMIS Pain Interference (p=0.0625) and PROMIS Anxiety (p=0.0704). Discussion Although there were significant improvements in most PROMs from pre-operation to 6 months post-operation, there were no significant changes in patient ranges of motion as obtained by motion capture. This discrepancy between PROMs and range of motion is consistent with previous literature (Grant, AJSM, 2022; Rylander, AOSSM, 2017; Aldrawan, Arthroscopy, 2014).
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Authors Gregory R. Roytman, Visiting Researcher Nils Becker, Visiting Student Researcher Ashika Sharma, Associate Professor of Orthopaedics & Rehabilitation Aidin E Pour, Assistant Professor of Orthopaedics & Rehabilitation Andrew Jimenez
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Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.447
URL
https://doi.org/10.1093/jhps/hnag043.447
Keywords Keywords not found

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