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Lookup NU author(s): Meredith JamesORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2024 The Author(s). Annals of Clinical and Translational Neurology published by Wiley Periodicals LLC on behalf of American Neurological Association. Objective: Limb-girdle muscular dystrophy R9 (LGMDR9, formerly known as LGMD2I), caused by variants in the fukutin-related protein (FKRP) gene leads to progressive muscle weakness of the shoulder and pelvic limb-girdles and loss of motor function over time. Clinical management and future trial design are improved by determining which standardized clinical outcome assessments (COA) of function are most appropriate to capture disease presentation and progression, informing endpoint selection and enrollment criteria. The purpose of our study was to evaluate the cross-sectional validity and reliability of clinical outcome assessments in patients with FKRP-related LGMDR9 participating in the Genetic Resolution and Assessments Solving Phenotypes in LGMD (GRASP) natural history study. Methods: Enrolled patients completed a battery of COA on two consecutive days, including the North Star Assessment for limb girdle-type dystrophies (NSAD), the 100-m timed test (100 m), and the Performance of Upper Limb 2.0 (PUL). Results: A total of 101 patients with FKRP-related LGMDR9 completed COA evaluations. All functional COA were highly and significantly correlated even across constructs, except for the 9-hole peg test. Similarly, all tests demonstrated excellent test–retest reliability across 2-day visits. The NSAD and PUL demonstrate robust psychometrics with good targeting, ordered response thresholds, fit and stability, and limited dependency of items across the scales. Conclusions: This study has determined the suitability of several functional COA, cross-sectionally, in LGMDR9 to inform future trial design and clinical care.
Author(s): Alfano LN, James MK, Grosfjeld Petersen K, Rudolf K, Vissing J, Augsburger R, Mozaffar T, Jones A, Butler A, Laubscher KM, Mockler SRH, Mathews KD, Iammarino MA, Reash NF, Pietruszewski L, Lowes LP, Strahler T, Wicklund M, Hunn S, Weihl CC, Sasidharan S, Currence M, Statland JM, Stinson N, Holzer M, Leung DG, Lott DJ, Kang PB, Holsten S, Desai U, Johnson NE
Publication type: Article
Publication status: Published
Journal: Annals of Clinical and Translational Neurology
Year: 2024
Pages: Epub ahead of print
Online publication date: 15/12/2024
Acceptance date: 23/11/2024
Date deposited: 09/01/2025
ISSN (electronic): 2328-9503
Publisher: John Wiley and Sons Inc.
URL: https://doi.org/10.1002/acn3.52276
DOI: 10.1002/acn3.52276
Data Access Statement: The data that support the findings of this study are available upon request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.
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