SAT0495 LONG TERM OUTCOME OF JUVENILE IDIOPATHIC ARTHRITIS IN ADULTHOOD; THE MONOCENTRIC EXPERIENCE OF 520 PATIENTS FOLLOWED FOR 20 YEARS IN A TRANSITION TERTIARY CLINIC OF PEDIATRIC RHEUMATOLOGY.

Abstract

Background: Juvenile Idiopathic Arthritis (JIA) is a chronic pediatric inflammatory disease that shows many differences compared to adult-onset arthritis. The different clinical manifestations, the assessment and the management of JIA is the reason that the transition from childhood to adulthood is an important multidimensional process that emphasizes a lot of aspects. Objective(s): To describe the long-term outcome of JIA. Method(s): Five-hundred and twenty patients affected by JIA and referred to a transition care rheumatology tertiary centre were considered between 1999 and 2019. The outcome assessment included remission, disease duration, medications, number of prosthesis implantation, pregnancies, mortality and social integration (employment status and educational level). Result(s): A hundred and thirty-eight (26%) males and 382 (73%) females were included; 157 (30%) patients were lost to follow up. The mean age of the patients was 27 (18-57) years, with a mean age at onset of 8 years and an average disease duration of 19 years. Subtypes of JIA at disease onset included 252 (48%) oligoarthritis, 134 (26%) polyarthritis, 64 (12%) systemic arthritis, 22 (4%) psoriatic arthritis, 43 (8%) enthesitis related arthritis and 1 (0.1%) undifferentiated arthritis. Ninty-three (18%) patients suffered of uveitis. Ninty-five implant prosthesis and 16 arthrodesis were recorded. At follow up 198 (38%) patients were on remission of which 107 (20%) off medication. Among the 322 patients still on medication, 84 (16%) were under treatment with oral steroids, 226 (43%) with sDMARDs and 249 (40%) with bDMARDs. Five deaths (1%) occurred in this cohort. Two hundred and thirty-five subjects had a higher educational level, 327 had an employment. We have data of twenty-nine pregnancies. The transition age was considered after the age of 16 years old. The key word for the management of this cohort was the multidisciplinary approach towards each patient, with the collaboration of other specialists (ophthalmologist, orthopedic, dermatologist, gastroenterologist, obstetric and psychologist). Conclusion(s): In the era of biologic therapy the long-term outcome of JIA underwent an outstanding improvement regarding a lot of variables. Two hundred and thirty-two patients were still followed, not only because of the continuation of the biological therapy, but also for a multidisciplinary care even during remission. JIA often persists over the adulthood, therefore the long term follow-up and care of these patients needs to be conducted by a rheumatologist expertized in JIA in collaboration with other specialists.