Multidimensional prognostic value of preoperative Prognostic Nutritional Index for postoperative outcomes in older adults undergoing major open abdominal surgery
To evaluate the predictive value of the preoperative Prognostic Nutritional Index (PNI) for multidimensional postoperative outcomes in elderly patients undergoing major abdominal surgery. This single-center retrospective cohort study included 761 patients aged ≥65 years from 2015 to 2025. Patients were str...