Ulcerative colitis (UC) severity is typically evaluated using the Ulcerative Colitis Endoscopic Index of Severity (UCEIS), but endoscopy is invasive and costly. To explore a non-invasive alternative, previous work proposed a Vision Transformer (ViT)-based model using stool images for binary classification of UCEIS scores. In this study, we extend this approach in two ways. First, to enable practical use in resource-limited and on-device settings, we implement lightweight models—MobileNetV2, EfficientNet-B0, ShuffleNetV2, and GhostNet—and compare their performance and efficiency against ViT. Second, we restructure UCEIS scores into three clinically relevant classes (0–1, 2–4, 5–8) for multi-class classification. This work demonstrates the feasibility and clinical value of stool image-based UC
Woo et al. (Fri,) studied this question.