Relationship between the preoperative AST/ALT ratio and postoperative delirium and 3-year mortality in patients undergoing total knee or hip arthroplasty: a prospective cohort study

Preoperative elevation of the serum AST/ALT ratio is a potential risk factor for POD, and its effect may be partially mediated by AD-related CSF biomarkers. However, an increase in the AST/ALT ratio did not have a significant effect on the three-year survival rate of POD patients.