How common is Granulomatosis with polyangiitis
What is the epidemiology of Granulomatosis with polyangiitis?
The true prevalence and incidence of GPA are unknown, but it is a rare disorder. It is much less common than other rheumatologic disorders, such as rheumatoid arthritis, systemic lupus erythematosus (SLE), polymyalgia rheumatica, and giant cell arteritis. The mean age at diagnosis is 41 years. Although the age range is 5 to 78 years, only 16% of patients are <18 years old. Males and females are equally affected. Caucasians are affected seven-fold more often than African-Americans.
