Prevalence of sporadic inclusion body myositis in Western Australia

Muscle Nerve. 2000 Jun;23(6):970-2. doi: 10.1002/(sici)1097-4598(200006)23:6<970::aid-mus20>;2-i.


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Female
  • Humans
  • Inclusion Bodies / pathology*
  • Male
  • Middle Aged
  • Myositis / epidemiology*
  • Myositis / pathology*
  • Prevalence
  • Retrospective Studies
  • Western Australia / epidemiology