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Keywords:

  • adolescent;
  • adult;
  • child/preschool;
  • follow-up study;
  • health status;
  • human;
  • locomotion;
  • male;
  • muscle strength/physiology;
  • muscular dystrophies/classification;
  • muscular dystrophies/Duchenne/physiopathology;
  • muscular dystrophies/therapy;
  • phenotype;
  • quality of life/psychology;
  • respiratory function test

ABSTRACT

Contemporary natural history data in Duchenne muscular dystrophy (DMD) is needed to assess care recommendations and aid in planning future trials.

Methods

The Cooperative International Neuromuscular Research Group (CINRG) DMD Natural History Study (DMD-NHS) enrolled 340 individuals, aged 2–28 years, with DMD in a longitudinal, observational study at 20 centers. Assessments obtained every 3 months for 1 year, at 18 months, and annually thereafter included: clinical history; anthropometrics; goniometry; manual muscle testing; quantitative muscle strength; timed function tests; pulmonary function; and patient-reported outcomes/health-related quality-of-life instruments.

Results

Glucocorticoid (GC) use at baseline was 62% present, 14% past, and 24% GC-naive. In those ≥6 years of age, 16% lost ambulation over the first 12 months (mean age 10.8 years).

Conclusions

Detailed information on the study methodology of the CINRG DMD-NHS lays the groundwork for future analyses of prospective longitudinal natural history data. These data will assist investigators in designing clinical trials of novel therapeutics. Muscle Nerve, 2013