RT Journal Article T1 Prognostic indicators in pediatric clinically isolated syndrome. A1 Iaffaldano, Pietro A1 Simone, Marta A1 Lucisano, Giuseppe A1 Ghezzi, Angelo A1 Coniglio, Gabriella A1 Brescia Morra, Vincenzo A1 Salemi, Giuseppe A1 Patti, Francesco A1 Lugaresi, Alessandra A1 Izquierdo, Guillermo A1 Bergamaschi, Roberto A1 Cabrera-Gomez, Jose Antonio A1 Pozzilli, Carlo A1 Millefiorini, Enrico A1 Alroughani, Raed A1 Boz, Cavit A1 Pucci, Eugenio A1 Zimatore, Giovanni Bosco A1 Sola, Patrizia A1 Lus, Giacomo A1 Maimone, Davide A1 Avolio, Carlo A1 Cocco, Eleonora A1 Sajedi, Seyed Aidin A1 Costantino, Gianfranco A1 Duquette, Pierre A1 Shaygannejad, Vahid A1 Petersen, Thor A1 Fernández Bolaños, Ricardo A1 Paolicelli, Damiano A1 Tortorella, Carla A1 Spelman, Tim A1 Margari, Lucia A1 Amato, Maria Pia A1 Comi, Giancarlo A1 Butzkueven, Helmut A1 Trojano, Maria A1 Italian iMedWeb Registry and the MSBase Registry, AB To assess prognostic factors for a second clinical attack and a first disability-worsening event in pediatric clinically isolated syndrome (pCIS) suggestive of multiple sclerosis (MS) patients. A cohort of 770 pCIS patients was followed up for at least 10 years. Cox proportional hazard models and Recursive Partitioning and Amalgamation (RECPAM) tree-regression were used to analyze data. In pCIS, female sex and a multifocal onset were risk factors for a second clinical attack (hazard ratio [HR], 95% confidence interval [CI] = 1.28, 1.06-1.55; 1.42, 1.10-1.84, respectively), whereas disease-modifying drug (DMD) exposure reduced this risk (HR, 95% CI = 0.75, 0.60-0.95). After pediatric onset MS (POMS) diagnosis, age at onset younger than 15 years and DMD exposure decreased the risk of a first Expanded Disability Status Scale (EDSS)-worsening event (HR, 95% CI = 0.59, 0.42-0.83; 0.75, 0.71-0.80, respectively), whereas the occurrence of relapse increased this risk (HR, 95% CI = 5.08, 3.46-7.46). An exploratory RECPAM analysis highlighted a significantly higher incidence of a first EDSS-worsening event in patients with multifocal or isolated spinal cord or optic neuritis involvement at onset in comparison to those with an isolated supratentorial or brainstem syndrome. A Cox regression model including RECPAM classes confirmed DMD exposure as the most protective factor against EDSS-worsening events and relapses as the most important risk factor for attaining EDSS worsening. This work represents a step forward in identifying predictors of unfavorable course in pCIS and POMS and supports a protective effect of early DMD treatment in preventing MS development and disability accumulation in this population. Ann Neurol 2017;81:729-739. YR 2017 FD 2017 LK https://hdl.handle.net/10668/27665 UL https://hdl.handle.net/10668/27665 LA en DS RISalud RD Apr 6, 2025