A better understanding of prognostic factors in ulcerative colitis (UC) could improve patient management and reduce complications. We aimed to identify evidence-based predictors for outcomes in pediatric UC, which may be used to optimize treatment algorithms.Potential outcomes worthy of prediction in UC were determined by surveying 202 experts in pediatric UC. A systematic review of the literature, with selected meta-analysis, was performed to identify studies that investigated predictors for these outcomes. Multiple national and international meetings were held to reach consensus on evidence-based statements.Consensus was reached on 31 statements regarding predictors of colectomy, acute severe colitis (ASC), chronically active pediatric UC, and cancer or mortality. At diagnosis, disease extent (six studies, n=627; P=.035), Pediatric Ulcerative Colitis Activity Index (PUCAI) score (four studies, n=318; P10 years), male sex, younger age at diagnosis, and thiopurine use.These evidence-based consensus statements offer predictions to be considered for a personalized medicine approach in treating pediatric UC.