RT Conference Proceedings T1 Prospective evaluation of cognitive function in patients with juvenile idiopathic arthritis A1 Ortiz-Marquez, F. A1 Padilla-Leiva, C. A1 Cabezudo-Garcia, P. A1 Diaz-Cordobes, G. A1 Munoz-Becerra, L. A1 Mena-Vazquez, N. K1 Methotrexate K1 Arthritis, Juvenile K1 Immunosuppressive Agents K1 Cytostatic Agents K1 Anti-Inflammatory Agents, Non-Steroidal AB Background: Juvenile idiopathic arthritis (JIA) is a chronic disease requiring years of therapy with non-steroidal anti-inflammatory drugs (NSAIDs), immunosuppressant’s, cytostatics, immunobiological agents. The aforementioned drugs, namely NSAIDs and cytostatics are potentially nephrotoxic [1]. The above drugs, namely NSAIDs and cytostatics, are potentially nephrotoxic. About 8% of children with JIA have kidney damage, which develops on average 5 years after the onset of the disease. It has been established that the main risk factor for the development of kidney damage is the long-term exposure to NSAIDs and methotrexate in children with active forms of JIA [2]. Early diagnosis of kidney damage will allow timely correction in the dosage of drugs and avoid their nephrotoxic effects [3]. Objectives: To determine the effect of drug therapy in children with JIA on eGFR by using the Cystatin C-based equation and the Hoek formula based on the serum cystatin C study. Methods: 80 children with JIA participated in the study. The age of subjects was 10.4±4.41 (10.6-15.0) years. All children received methotrexate as a base drug. At the moment of examination 22 children received NSAIDs, 25 children received immunobiological preparations. Serum cystatin C content was determined by enzyme immunoassay. The Cystatin C-based equation 2012 and Hoek formulas were used to set the GFR by serum cystatin C levels. PB BMJ Group SN 0003-4967 YR 2022 FD 2022-05-23 LK http://hdl.handle.net/10668/20084 UL http://hdl.handle.net/10668/20084 LA en NO Ortiz-Márquez, F., Padilla-Leiva, C., Cabezudo-García, P., Diaz-Cordobes, G., Muñoz-Becerra, L., & Mena-Vázquez, N. (2022). AB1240 PROSPECTIVE EVALUATION OF COGNITIVE FUNCTION IN PATIENTS WITH JUVENILE IDIOPATHIC ARTHRITIS. Annals Of The Rheumatic Diseases, 81(Suppl 1), 1731.3-1732 DS RISalud RD Jul 4, 2025