Abstract
Abstract Background Intestinal ultrasound (IUS) scoring systems have been developed to detect disease activity in patients with ulcerative colitis (UC). Nevertheless, further and comparing studies IUS scores to evaluate disease activity in UC patients are needed. We aimed to compare 2 existing validated scores, the Milan Ultrasound Criteria (MUC) and Ulcerative Colitis Intestinal Ultrasound (UC-IUS) index, for evaluating disease activity in patients with UC. Methods An observational cross-sectional study was performed in adult UC patients between November 2019 and June 2024. All UC patients underwent IUS before a day colonoscopy, and endoscopic Mayo score ≥2 was accepted as an active disease. Results Total 62 adult patients with UC (median age: 39 years) were included in the study, 39 (62.9%) patients were male, the median age was 39 years and the median duration of the disease was 6.32 (IQR, 2.63-12.32) years. Extensive location was the most prevalent extension 39 (62.9%) among all patients. The median MUC was 8.42 (IQR, 6.34-10.96) and the median UC-IUS index was 5 (IQR, 4-6.25) for all UC patients. In patients with endoscopically remission group (endoscopic Mayo score <2), which include 14 (22.6%) patients, the median MUC was 5.76 (IQR, 3.61-6.8) and the median UC-IUS index was 3 (IQR, 2-4). Nevertheless, in endoscopically active group, the median MUC was 9.14 (IQR, 7.6-11.63) and the median UC-IUS index was 6 (IQR, 4-7), MUC and UC-IUS index were higher in endoscopic active group than in remission group (p< 0.001). Furthermore, the clinically active group (partial Mayo score ≥5) had greater MUC and UC-IUS index than the clinically remission group (p< 0.005 and p< 0.001, respectively). The cut-off value for MUC to predict endoscopic activity (endoscopic Mayo score ≥2) was 7.46 (AUC: 0.906, 95% CI: 0.830-0.983, sensitivity: 81%, specificity: 86%, p < 0.001), and the cut-off value for UC-IUS index to expect endoscopic activity was 4.5 (AUC: 0.846, 95% CI: 0.739-0.953, sensitivity: 71%, specificity: 86%, p < 0.001). Conclusion In this study, we found that MUC and UC-IUS index demonstrates a strong correlation with the endoscopically active UC patients. The most accurate cut-off value for MUC was 7.6 and the most accurate cut-off value for UC-IUS index was 4.5 in UC patients with endoscopically active group.
Published Version
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