Disease Activity Patterns in the First 5 Years After Diagnosis in Children With Ulcerative Colitis: A...

Area of Science:

• Pediatric Gastroenterology
• Inflammatory Bowel Disease Research
• Clinical Cohort Studies

Background:

• Understanding disease activity patterns in pediatric ulcerative colitis (UC) is crucial for effective management.
• Identifying early prognostic factors can guide treatment strategies and improve long-term outcomes in children with UC.

Purpose of the Study:

• To define distinct clusters of disease activity in children with UC during the first five years post-diagnosis.
• To identify early prognostic risk factors associated with different disease activity trajectories in pediatric UC.

Main Methods:

• Analysis of a population-based cohort of pediatric UC patients from the SIGENP IBD registry with at least 5 years of follow-up.
• Disease activity assessed every six months using clinical (Pediatric UC Activity Index), endoscopic (Mayo score), and biochemical (fecal calprotectin) markers, alongside hospitalizations, surgeries, and treatment escalations.
• Activity clusters were generated using a formula-based approach adapted from adult patterns, with an additional cluster.

Main Results:

• 226 pediatric UC patients were analyzed, revealing diverse activity patterns: 19% chronically active, 14% chronic-intermittent, 33% quiescent, 24% active then remission, and 11% remission then active.
• Mild disease onset and lack of corticosteroid use at 6 months were significant predictors of a subsequent quiescent disease course (AUC 0.86).
• Only 8% of patients required surgery, with none occurring in the quiescent disease group (p=0.04).

Conclusions:

• Over one-third of children with UC exhibit a chronically active or intermittent disease course within the first five years.
• A notable subgroup experiences active disease initially, followed by sustained remission.
• Early indicators like mild onset and minimal corticosteroid use are associated with better long-term disease control and reduced need for surgery in pediatric UC.