GPT and portal hypertension: The preoperative information of a patient was input into the model: age 56 years, no portal hypertension, diagnosed with viral hepatitis, hemoglobin 65 g/L, direct bilirubin level 158.2 μmol/L, APTT 81.2 s, globulin level 12.3 g/L, ALT 688 U/L, and AST 991 U/L.