Polymyositis and dermatomyositis epidemiology and demographics
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:
Overview
Epidemiology and Demographics
Incidence
- The incidence of polymyositis and dermatomyositis is approximately 2 per 100,000 individuals worldwide.[1]
- In 2010, the incidence of polymyositis and dermatomyositis was estimated to be 1-1.3 cases per 100,000 individuals in Japan annually.[2]
- In 1970, the age‐adjusted annual incidence of polymyositis was 5 cases per 100,000 individuals in USA hospital‐based retrospective study.[3]
Prevalence
- The prevalence of polymyositis and dermatomyositis is approximately 5-22 per 100,000 individuals worldwide.[1]
- In 2003, the prevalence of polymyositis and dermatomyositis was estimated to be 21.5 cases per 100,000 individuals in Quebec.[4]
- In 2010, the prevalence of polymyositis and dermatomyositis was estimated to be 13.2 cases per 100,000 individuals in Japan.[2]
Case-fatality rate/Mortality rate
- The 5-year survival rate for polymyositis is 75% and for dermatomyositis is 63%.[2]
- The median survival for polymyositis is 11.0 years and that for dermatomyositis is 12.3 years.[2]
Age
- Dermatomyositis commonly affects both children and adults.[5]
- Polymyositis commonly affects adults after second decades of their lives and it is rare among children.[5][6]
Race
- There is no racial predilection to polymyositis and dermatomyositis.
Gender
- Females are more commonly affected by polymyositis and dermatomyositis than males. The female to male ratio is approximately 2 to 1.[5]
Region
- Prevalence of polymyositis and dermatomyositis are lower in young rural men and higher in older urban women.[7]
References
- ↑ 1.0 1.1 Jacobson DL, Gange SJ, Rose NR, Graham NM (September 1997). "Epidemiology and estimated population burden of selected autoimmune diseases in the United States". Clin. Immunol. Immunopathol. 84 (3): 223–43. PMID 9281381.
- ↑ 2.0 2.1 2.2 2.3 Airio, A.; Kautiainen, H.; Hakala, M. (2006). "Prognosis and mortality of polymyositis and dermatomyositis patients". Clinical Rheumatology. 25 (2): 234–239. doi:10.1007/s10067-005-1164-z. ISSN 0770-3198.
- ↑ Dalakas, Marinos C; Hohlfeld, Reinhard (2003). "Polymyositis and dermatomyositis". The Lancet. 362 (9388): 971–982. doi:10.1016/S0140-6736(03)14368-1. ISSN 0140-6736.
- ↑ Bernatsky, S; Joseph, L; Pineau, C A; Belisle, P; Boivin, J F; Banerjee, D; Clarke, A E (2008). "Estimating the prevalence of polymyositis and dermatomyositis from administrative data: age, sex and regional differences". Annals of the Rheumatic Diseases. 68 (7): 1192–1196. doi:10.1136/ard.2008.093161. ISSN 0003-4967.
- ↑ 5.0 5.1 5.2 Dalakas, Marinos C; Hohlfeld, Reinhard (2003). "Polymyositis and dermatomyositis". The Lancet. 362 (9388): 971–982. doi:10.1016/S0140-6736(03)14368-1. ISSN 0140-6736.
- ↑ Dalakas, Marinos C; Hohlfeld, Reinhard (2003). "Polymyositis and dermatomyositis". The Lancet. 362 (9388): 971–982. doi:10.1016/S0140-6736(03)14368-1. ISSN 0140-6736.
- ↑ Bernatsky, S; Joseph, L; Pineau, C A; Belisle, P; Boivin, J F; Banerjee, D; Clarke, A E (2008). "Estimating the prevalence of polymyositis and dermatomyositis from administrative data: age, sex and regional differences". Annals of the Rheumatic Diseases. 68 (7): 1192–1196. doi:10.1136/ard.2008.093161. ISSN 0003-4967.