GPT and infection: The final 23 features included in the model were classified as follows: vital signs (respiration, pulse, and body temperature), blood routine test values (WBC count, neutrophil count, platelet count, basophilic count, lymphocyte percentage, and mean hemoglobin volume), electrolytes (serum potassium and ionic calcium levels), liver function indicators (ALT level), coagulation function (APTT), and infection index (CRP).