Abstract:
INTRODUCTION:Congenital myotonic dystrophy (CDM) occurs when symptoms of myotonic dystrophy present at birth. In this study we evaluated the relationship between physical function, muscle mass, and age to provide an assessment of the disease and help prepare for therapeutic trials. METHODS:CDM participants performed timed functional tests (TFTs), the first 2 minutes of 6-minute walk tests (2/6MWTs), and myometry tests, and also performed dual-energy X-ray absorption (DEXA) scans. Healthy controls (HCs) performed TFTs, 6MWTs, and myometry. RESULTS:Thirty-seven children with CDM and 27 HCs (age range 3-13 years) participated in the study. There were significant differences in the 10-meter walk (11.3 seconds in CDM vs. 6.8 seconds in HC) and 2MWT (91 meters in CDM vs. 193 meters in HCs). DEXA lean mass of the right arm correlated with grip strength (r = 0.91), and lean mass of the right leg correlated with 6MWT (r = 0.62). CONCLUSION:Children with CDM have significant limitations in strength and mobility. The tests performed were reliable, and lean muscle mass may serve as a useful biomarker. Muscle Nerve 56: 224-229, 2017.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Pucillo EM,Dibella DL,Hung M,Bounsanga J,Crockett B,Dixon M,Butterfield RJ,Campbell C,Johnson NEdoi
10.1002/mus.25482subject
Has Abstractpub_date
2017-08-01 00:00:00pages
224-229issue
2eissn
0148-639Xissn
1097-4598journal_volume
56pub_type
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