title: Prevalence of sporadic inclusion body myositis in Western Australia.
abstract: A 10-year retrospective review was conducted to ascertain the prevalence of inclusion body myositis (IBM) in Western Australia. Seventeen patients with sporadic IBM aged 45-90 years were identified and the prevalence of IBM was calculated to be 9.3 x 10(-6). The prevalence was higher in men (10.9 x 10(-6)) than in women (7.7 x 10(-6)). The mean age of onset of IBM was 56.6 years, and the mean delay between onset of symptoms and diagnosis was 4.4 years. The age-adjusted prevalence over the age of 50 years was 35.3 x 10(-6). The results suggest a higher prevalence of IBM than has previously been reported.
authors.affiliation: Centre for Neuromuscular and Neurological Disorders, Australian Neuromuscular Research Institute, University of Western Australia, Australia.
authors.forename: B A
authors.initials: BA
authors.lastname: Phillips
authors.forename: P J
authors.initials: PJ
authors.lastname: Zilko
authors.forename: F L
authors.initials: FL
authors.lastname: Mastaglia
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D002479:Inclusion Bodies / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009220:Myositis / Q000453:epidemiology* / Q000473:pathology*; D015995:Prevalence; D012189:Retrospective Studies; D014904:Western Australia / Q000453:epidemiology