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Article Abstract
Introduction: The objective of this study was to obtain a 6-month natural history of motor function performance in individuals with RYR1- related myopathy (RYR1-RM) by using the Motor Function Measure-32 (MFM-32) and graded functional tests (GFT) while facilitating preparation for interventional trials.
Methods: In total, 34 participants completed the MFM-32 and GFTs at baseline and 6-month visits.
Results: Motor deficits according to MFM-32 were primarily observed in the standing and transfers domain (D1; mean 71%). Among the GFTs, participants required the most time to ascend/descend stairs (>7.5 s). Functional movement, determined by GFT grades, was strongly correlated with MFM-32 (D1; r ≥ 0.770, P < 0.001). Motor Function Measure-32 and GFT scores did not reflect any change in performance between baseline and 6-month visits.
Discussion: The MFM-32 and GFTs detected motor impairment in RYR1-RM, which remained stable over 6 months. Thus, these measures may be suitable for assessing change in motor function in response to therapeutic intervention. Muscle Nerve 60: 80-87, 2019.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6619391 | PMC |
| http://dx.doi.org/10.1002/mus.26491 | DOI Listing |
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