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Diseases » Dermatomyositis » Prevalence

Prevalence and Incidence of Dermatomyositis

Prevalance of Dermatomyositis:

13,462 people with polymyositis/dermatomyositis in the USA 1996 1 ... see also overview of Dermatomyositis.

Prevalance Rate:

approx 1 in 20,205 or 0.00% or 13,461 people in USA [Source statistic for calcuation: "13,462 people with polymyositis/dermatomyositis in the USA 1996 1" -- see also general information about data sources]

Dermatomyositis: Rare Disease

Dermatomyositis is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Dermatomyositis, or a subtype of Dermatomyositis, affects less than 200,000 people in the US population.

Ophanet, who are a consortium of European partners, currently defines a condition rare when if affects 1 person per 2,000. They list Dermatomyositis as a "rare disease". More information about Dermatomyositis is available from Orphanet

More Statistics about Dermatomyositis:

  • Hospitalization statistics
  • All statistics for Dermatomyositis

    About prevalence and incidence statistics:

    The term 'prevalence' of Dermatomyositis usually refers to the estimated population of people who are managing Dermatomyositis at any given time. The term 'incidence' of Dermatomyositis refers to the annual diagnosis rate, or the number of new cases of Dermatomyositis diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

    1. Rose and Mackay, 1998, The Autoimmune Diseases, Third Edition


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