Crohn's disease (CD) and ulcerative colitis (UC) are two inflammatory bowel diseases (IBD) characterized by chronic intestinal inflammation. In this study, the clinical characteristics of a cohort of pediatric patients with IBD are reviewed and their responses to induction therapy are evaluated. The severity of disease for 43 patients (20 with CD and 23 with UC) was determined using the PCDAI and PUCAI and based on the initial severity, before treatment was started. Following treatment, the severity of disease was re-evaluated at 6 months after the initial diagnosis. The patients in both groups had mild-to-severe disease. The mean PCDAI and PUCAI values were 60.62 +/- 16.48 and 50.95 +/- 9.35, for CD and UC patients, respectively. Most patients (83.7 %) responded to standard treatments with a significant reduction in the PCDAI and PUCAI scores from baseline (p value < 0.001). At the primary endpoint of 24 weeks, 54 % of all patients were in clinical remission; 16 of 23 in the UC group (70 %) and 6 of 20 in the CD group (30 %). The results of this study provide evidence that subgrouping pediatric patients with IBD into distinct clinical phenotypes based on severity of the initial presentation may provide better means of management of this group. This approach can result in a better response to treatment and reduce the side effects of unnecessary therapy.
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