What is the incidence of giant cell arteritis (GCA) (temporal arteritis) in the US?

Updated: Sep 10, 2020
  • Author: Mythili Seetharaman, MD; Chief Editor: Herbert S Diamond, MD  more...
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The reported incidence of GCA ranges from approximately 0.5 to 27 cases per 100,000 people aged 50 years or older. [17] The annual incidence is higher in northern areas of the United States.

A review from Olmsted County, Minnesota identified 125 cases over a period of 42 years, representing an average annual incidence rate of 17.8 cases per 100,000 population aged 50 years and older and a prevalence of persons with active or remitted GCA of 200 cases per 100,000 population aged 50 years or older. A regular cyclical pattern in incidence over 20 years was noted. [33]

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