A Comparison Between the Bowel Ultrasound Score and International Bowel Ultrasound Segmental Activity Score Based on Ileocolonoscopy in Patients with Crohn’s Disease

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Abstract

Background and Aim We aimed to compare two main existing scores, Bowel Ultrasound Score (BUSS) and International Bowel Ultrasound Segmental Activity Score (IBUS-SAS) to predict simplified endoscopic activity score for CD (SES-CD). Methods A cross-sectional study was performed to evaluate the disease activity in CD patients with ileal involvement between November 2019 and February 2024. Remission for CD was accepted for SES-CD ≤2. Results Total 56 adult patients with CD (Male; 38, 67.9%, Median age; 40.5 years) were included in the study, the median duration of the disease was 8.4 years. The cut-off value for BUSS to determine endoscopic remission was 3.9, while the cut-off value for IBUS-SAS to establish endoscopic remission was 24.4. BUSS and SES-CD had a strong positive correlation (p<0.001), BUSS and IBUS-SAS had a high positive correlation (p<0.001), and BUSS and CRP had a slightly positive correlation (p<0.001). Conclusion In this study, we found that the most accurate cut-off value for BUSS was 3.9 and the most accurate cut-off value for IBUS-SAS was 24.4 in CD patients with endoscopic remission group. Furthermore, we have confirmed that both BUSS and IBUS-SAS significantly correlate with endoscopic activity in a real-world cohort.

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