OP05 Validation of the Lémann index in Crohn’s disease

Background The Lémann index (LI) is the first instrument developed to measure cumulative structural bowel damage in Crohn’s disease (CD).1 We here report its validation. Methods This was an international, multicentre, prospective cross-sectional observational study. At each centre, 10 inclusions, stratified by known or suspected CD location and duration, were planned. Clinical examination and abdominal MRI had to be performed in all patients,...