The other side of the coin: Uveitis in patients with juvenile idiopathic arthritis

Objective: Juvenile idiopathic arthritis (JIA) is a childhood rheumatic disease that causes joint inflammation and tissue damage. Non-infectious uveitis is the most common extra-articular manifestation of JIA.The aim of this study is to evaluate the risk factors that play a role in occurrence and recurrence of uveitis and, to determine the relationship between arthritis and uveitis activity in patients with JIA. Material and Methods: This retrospective, cross sectional study included JIA patients with/without uveitis from a referral center in Turkey. The Juvenile Arthritis Disease Activity Score was used to evaluate the disease activity and calculated for arthritis and uveitis separately. Results: Uveitis was seen in 26 (13.3%) of 195 JIA patients. Of 26 JIA associated uveitis (JIA-U) patients, 19 (73%) had an oligoarticular subtype. The median age at diagnosis of JIA with uveitis was younger than without uveitis (p=0.015). Oligoarticular JIA was found to be associated with recurrence of uveitis (p=0.021). The occurrence age of arthritis and uveitis was significantly younger in patients with recurrent uveitis (p=0.041, p=0.002, respectively). The median JADAS27 score at the onset of uveitis was lower in the recurrent group (p=0.038). Conclusion: Early age is a significant risk factor for occurrence and recurrence of uveitis. It is important to remember that, during the disease course, patients with low disease activity may also develop uveitis.