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Guest: Yash Mittal, MD
Reliability of Measuring Ileo-Colonic Disease Activity in Crohn's Disease by Magnetic Resonance Enterography. Vipul Jairath, MD, PhD, Ingrid Ordas, MD, PhD, Guangyong Zou, PhD, Julian Panes, MD, Jaap Stoker, MD, PhD, Stuart A Taylor, MD, Cynthia Santillan, MD, Karin Horsthuis, MD, Mark A Samaan, MD, Lisa M Shackelton, PhD, Larry W Stitt, MSc, Pieter Hindryckx, MD, PhD, Reena Khanna, MD, William J Sandborn, MD ,Geert D'Haens, MD, PhD, Brian G Feagan, MD, Barrett G Levesque, MD, and Jordi Rimola, MD, PhD BACKGROUND: Magnetic resonance enterography is increasingly utilized for assessment of luminal Crohn's disease activity. The Magnetic Resonance Index of Activity and the London Index are the most commonly used outcome measures in clinical trials. We assessed the reliability of these indices and several additional items. METHODS: A consensus process clarified scoring conventions and identified additional items based on face validity. Four experienced radiologists evaluated 50 images in triplicate, in random order, at least 1 month apart, using a central image management system. Intra- and interrater reliability were assessed by calculating and comparing intraclass correlation coefficients. RESULTS: Intrarater intraclass correlation coefficients (95% confidence intervals) for the Magnetic Resonance Index of Activity, London, and London "extended" indices and a visual analogue ...


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