Incidence and clinical characteristics of pediatric inflammatory bowel disease in Oman.

Background: Pediatric inflammatory bowel disease (PIBD) has been documented all over the world, and there is now a large body of clinical, pathological, and treatment knowledge and protocols in place in many countries. There is currently limited knowledge on the prevalence and pathology of PIBD in Omani population. The aim of this study is to report the incidence and clinical features of PIBD in Oman.

Methods: This was a retrospective, cross-sectional, multicenter study carried out on all children <13 years of age between January 1, 2010 and December 31, 2021.

Results: Fifty-one children were identified, 22 males (43.1%) and 29 females (56.9%), who were mostly from the Muscat region of Oman. The median incidence in the country was 0.57 (confidence interval [CI]: 0.31-0.64) per 10⁵ children for inflammatory bowel disease (IBD), 0.18 (CI: 0.07-0.38) per 10⁵ children for ulcerative colitis (UC), and 0.19 (CI: 0.12-0.33) per 10⁵ children for Crohn's disease (CD). There was a significant increase in the incidence of all PIBD types after the year 2015. Bloody diarrhea was the most common symptom, followed by abdominal pain. Perianal disease affected nine children (40.9%) with CD.

Conclusion: The incidence of PIBD in Oman is lower than in some neighboring Gulf countries but similar to that of Saudi Arabia. An alarming upward trend was noted from the year 2015. Large-scale population-based studies are required to investigate the possible causes of this increasing incidence.