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Retrospective Cohort Study
©The Author(s) 2026.
World J Gastroenterol. Jan 21, 2026; 32(3): 115527
Published online Jan 21, 2026. doi: 10.3748/wjg.v32.i3.115527
Figure 1
Figure 1 Study flow for the machine learning of internal and external validation set. CatBoost: Categorical boosting; LassoLR: L1 regularized logistic regression; ML: Machine learning; NVGB: Nonvariceal gastrointestinal bleeding; RF: Random forest; SVM: Support vector machines; XGBoost: Extreme gradient boosting.


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