How many people are affected by or are at risk of muscular dystrophy?

The incidence of muscular dystrophy (MD) in the United States varies, because different kinds of MD are rarer than others. The most common forms in children, Duchenne and Becker, affect approximately 1 in every 5,600 to 7,700 males ages 5 to 24.1 The most common adult form, type 1 myotonic MD, affects 1 in 8,000 worldwide.2


  1. Centers for Disease Control and Prevention. (2009). Prevalence of Duchenne/Becker muscular dystrophy among males aged 5-24 years—four states, 2007. MMWR Morbidity and Mortality Weekly Report, 58, 1119-1122. Retrieved June 21, 2012, from
  2. Myotonic Dystrophy Foundation. (undated.). Types of DM. Retrieved July 17, 2012, from External Web Site Policy

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