Validation of international algorithms to identify adults with inflammatory bowel disease in health administrative data from Ontario, Canada

OBJECTIVE: Health administrative databases can be used to track disease incidence, outcomes, and care quality. Case validation is necessary to ensure accurate disease ascertainment using these databases. In this study, we aimed to validate adult-onset inflammatory bowel disease (IBD) identification algorithms. STUDY DESIGN AND SETTING: We used two large cohorts of incident patients from Ontario, Canada to validate algorithms. We linked …