Very Early Pouchitis Is Associated with an Increased Likelihood of Chronic Inflammatory Conditions of the Pouch.

INTRODUCTION: Chronic inflammatory conditions of the pouch are common after ileal pouch-anal anastomosis (IPAA) for ulcerative colitis (UC). AIMS: We aimed to investigate the relationship between acute pouchitis within 180 days of the final stage of IPAA surgery (very early pouchitis) and the future development of chronic antibiotic dependent pouchitis (CADP) and Crohn's-like disease of the pouch (CLDP). METHODS: We performed a retrospective cohort study, evaluating patients who underwent proctocolectomy with IPAA between January 1, 2004 and December 31, 2016. Multivariable logistic regression was used to evaluate the relationship between very early pouchitis and the development of CADP and CLDP. RESULTS: Among 626 patients undergoing IPAA for UC, 137 (22%) developed very early pouchitis, 75 (12%) developed CADP, and 59 (9%) developed CLDP in a median follow-up of 5.18 years (interquartile range 0.94-10.8 years). Very early pouchitis was associated with a significant increase in the odds of developing CADP (adjusted odds ratio [aOR3.65, 95% CI 2.19-6.10) as was primary sclerosing cholangitis (aOR 3.97, 95% CI 1.44-11.0). Very early pouchitis was associated with increased odds for developing CLDP (aOR 2.77, 95% CI 1.54-4.98) along with a family history of inflammatory bowel disease (aOR 2.10, 95% CI 1.11-3.96). CONCLUSION: In this cohort, very early pouchitis was associated with an increased risk of developing CADP and CLDP. These findings highlight very early pouchitis as a unique risk factor for chronic inflammatory conditions of the pouch and the need for future studies evaluating potential strategies for secondary prophylaxis strategies in this population.