GPT and diabetes mellitus: ADL, activities of daily living; ALT, alanine aminotransferase; AST, aspartate aminotransferase; BUN, blood urea nitrogen; DM, diabetes mellitus; eGFR, estimated glomerular filtration rate; GDS, geriatric depression scale; LightGBM, light gradient boosing machine; LogReg, logistic regression; MNA, mini-nutritional assessment; SVM, support vector machine; RF, random forest classifier; TUGT, timed-up-and-go test