Our Canadian research, looking at over 1,000 children newly diagnosed with JIA, has shown that the most important contributors to probability of uveitis are a positive ANA and being diagnosed at a young age.  Uveitis was most commonly seen in children with either oligoarthritis or polyarticular rheumatoid factor negative JIA. We also saw that there was an incidence of new uveitis among these children of 2.8% per year for the 5 years of the study. This means that children with JIA need to continue to be screened for uveitis for at least 5 years after diagnosis.