What is the incidence of juvenile idiopathic arthritis (JIA) in the US?

Updated: Jul 25, 2019
  • Author: David D Sherry, MD; Chief Editor: Lawrence K Jung, MD  more...
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Approximately 300,000 children in the United States are estimated to have some type of arthritis. The incidence rate estimates for JIA range from 4-14 cases per 100,000 children annually; for JRA, the prevalence has ranged from 1.6 to 86.1 cases per 100,000. [14] These wide-ranging numbers are attributable to differing definitions and criteria for childhood arthritis; population differences, including environmental exposure and immunogenetic susceptibility; and difficulty in case ascertainment and lack of population based data.

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