The Modified Pouchitis Disease Activity Index (mPDAI) will be used to evaluate for pouchitis and assess the overall disease activity for each subject at baseline pouchoscopy. This modified diagnostic instrument consists of two component scores: clinical symptoms (range 0-6 points) and endoscopic appearence (range 0-6 points). Follow-up pouchoscopy is not part of the study protocol. However, if a patient warrants follow-up pouchoscopy at any point during the study period based on standard of care (most likley due to worsening or non-responsive symptoms), then the mPDAI at follow-up pouchoscopy will also be calculated and included in outcomes analysis.