RT Journal Article T1 Are infections in children with juvenile idiopathic arthritis more frequent than in healthy children? A prospective multicenter observational study. A1 Udaondo, Clara A1 Nuñez-Cuadros, Esmeralda A1 Murias, Sara A1 Remesal, Agustin A1 Alcobendas, Rosa A1 Guerrero, Concepcion A1 Guillen-Martin, Sara A1 Escuredo, Marta A1 Aleo, Esther A1 Alonso, Daniel A1 Tagarro, Alfredo A1 De-Santiago, Eloisa A1 Camacho-Lovillo, Marisol A1 Diaz, Fatima A1 Arenas, Dolores A1 Camacho, Pilar A1 Lirola, Maria Jose A1 Diaz-Almiron, Mariana A1 Calvo, Cristina K1 Infection rate K1 Infections K1 Juvenile idiopathic arthritis (JIA) K1 Methotrexate K1 Safety K1 Tumor necrosis alpha antagonist K1 Área de Gestión Sanitaria Sur de Sevilla AB Children with juvenile idiopathic arthritis (JIA) might be at a higher risk of infection. Our objectives are to describe and compare infection rates in patients with JIA vs. healthy patients. A prospective, multicenter observational study was performed in Spain from January 2017 to June 2019. Patients with JIA from 7 participating hospitals and children without JIA (siblings of patients with JIA, and non-JIA children from primary health centers) were followed up with quarterly questionnaires to record infection episodes. Tuberculosis, herpes zoster, and infections requiring hospital admission were considered severe infections. Rates of infection (episodes/patient/year) were compared using a generalized estimating equations model. A total of 371 children (181 with and 190 without JIA) were included. The median age was 8.8 years (IQR 5.5-11.3); 75% of the patients with JIA received immunosuppressive treatment (24% methotrexate, 22% biologic, 26% both). A total of 667 infections were recorded; 15 (2.2%) were considered severe. The infection rate was 1.31 (95%CI 1.1-1.5) in JIA and 1.12 (95%CI 0.9-1.3) in non-JIA participants (p = 0.19). Age We found no differences in the infection rate or infection severity between patients with and without JIA. Most infections were mild. An age younger than 4 years increased the infection risk in both groups. Higher disease activity was associated with a higher infection rate. PB Frontiers Research Foundation SN 2296-2360 YR 2022 FD 2022-08-11 LK http://hdl.handle.net/10668/20695 UL http://hdl.handle.net/10668/20695 LA en NO Udaondo C, Núñez Cuadros E, Murias S, Remesal A, Alcobendas R, Guerrero C, et al. Are infections in children with juvenile idiopathic arthritis more frequent than in healthy children? A prospective multicenter observational study. Front Pediatr. 2022 Aug 11;10:917731 DS RISalud RD Apr 7, 2025