Validating the Simplified Endoscopic Mucosal Assessment for Crohn's Disease: A Novel Method for Assessing Disease...

Area of Science:

• Gastroenterology
• Endoscopic assessment
• Inflammatory bowel disease

Background:

• Standardized endoscopic assessment is crucial for Crohn's disease (CD) trials but often not used in routine practice.
• The Simple Endoscopic Score for Crohn's Disease (SES-CD) is a standard but complex tool.
• A simpler, validated tool is needed for routine clinical practice and clinical trials.

Purpose of the Study:

• To develop and validate the Simplified Endoscopic Mucosal Assessment for Crohn's Disease (SEMA-CD) as a reliable and feasible measure of endoscopic disease activity.
• To assess SEMA-CD's correlation with the established SES-CD.
• To evaluate SEMA-CD's ease of use and reliability in clinical settings.

Main Methods:

• Ileocolonoscopy videos from 110 pediatric and adult CD patients in ustekinumab trials were scored using SEMA-CD by blinded central readers.
• SEMA-CD scores were compared with existing SES-CD scores.
• Inter- and intra-rater reliability, sensitivity to change, and ease of scoring were assessed.

Main Results:

• SEMA-CD demonstrated strong correlation with SES-CD (Spearman ρ = 0.89).
• Changes in SEMA-CD scores pre- and post-treatment strongly correlated with SES-CD changes.
• Good inter- and intra-rater reliability was observed, with SEMA-CD rated as easier to score than SES-CD in most cases.

Conclusions:

• SEMA-CD is a reliable, reproducible, and sensitive tool for assessing endoscopic disease activity in Crohn's disease.
• The SEMA-CD is easy to use in routine clinical practice and suitable for clinical trials involving both pediatric and adult patients.
• SEMA-CD offers a practical alternative for endoscopic assessment in CD management and research.