Assessing the Relationship of Patient Reported Outcome Measures With Functional Status in Dysferlinopathy: A Rasch Analysis Approach

Anna G. Mayhew, Meredith K. James, Ursula Moore, Helen Sutherland, Marni Jacobs, Jia Feng, Linda Pax Lowes, Lindsay N. Alfano, Robert Muni Lofra, Laura E. Rufibach, Kristy Rose, Tina Duong, Luca Bello, Irene Pedrosa-Hernández, Scott Holsten, Chikako Sakamoto, Aurélie Canal, Nieves Sánchez-Aguilera Práxedes, Simone Thiele, Catherine SienerBruno Vandevelde, Brittney DeWolf, Elke Maron, Heather Gordish-Dressman, Heather Hilsden, Michela Guglieri, Jean Yves Hogrel, Andrew M. Blamire, Pierre G. Carlier, Simone Spuler, John W. Day, Kristi J. Jones, Diana X. Bharucha-Goebel, Emmanuelle Salort-Campana, Alan Pestronk, Maggie C. Walter, Carmen Paradas, Tanya Stojkovic, Madoka Mori-Yoshimura, Elena Bravver, Jordi Díaz-Manera, Elena Pegoraro, Jerry R. Mendell, COS Consortium Jain COS Consortium, Volker Straub

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Dysferlinopathy is a muscular dystrophy with a highly variable functional disease progression in which the relationship of function to some patient reported outcome measures (PROMs) has not been previously reported. This analysis aims to identify the suitability of PROMs and their association with motor performance.Two-hundred and four patients with dysferlinopathy were identified in the Jain Foundation's Clinical Outcome Study in Dysferlinopathy from 14 sites in 8 countries. All patients completed the following PROMs: Individualized Neuromuscular Quality of Life Questionnaire (INQoL), International Physical Activity Questionnaire (IPAQ), and activity limitations for patients with upper and/or lower limb impairments (ACTIVLIMs). In addition, nonambulant patients completed the Egen Klassifikation Scale (EK). Assessments were conducted annually at baseline, years 1, 2, 3, and 4. Data were also collected on the North Star Assessment for Limb Girdle Type Muscular Dystrophies (NSAD) and Performance of Upper Limb (PUL) at these time points from year 2. Data were analyzed using descriptive statistics and Rasch analysis was conducted on ACTIVLIM, EK, INQoL. For associations, graphs (NSAD with ACTIVLIM, IPAQ and INQoL and EK with PUL) were generated from generalized estimating equations (GEE). The ACTIVLIM appeared robust psychometrically and was strongly associated with the NSAD total score (Pseudo R2 0.68). The INQoL performed less well and was poorly associated with the NSAD total score (Pseudo R2 0.18). EK scores were strongly associated with PUL (Pseudo R2 0.69). IPAQ was poorly associated with NSAD scores (Pseudo R2 0.09). This study showed that several of the chosen PROMs demonstrated change over time and a good association with functional outcomes. An alternative quality of life measure and method of collecting data on physical activity may need to be selected for assessing dysferlinopathy.

Original languageEnglish
Article number828525
JournalFrontiers in Neurology
StatePublished - Mar 10 2022


  • PROMs
  • clinical outcome assessments
  • dysferlinopathy
  • limb girdle muscular dystrophy
  • quality of life


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