Association Between Preoperative Malnutrition Assessed by the Controlling Nutritional Status (CONUT) Score and Postoperative Delirium in Elderly Patients with Hip Fractures: A Retrospective Cohort Study

Background

Postoperative delirium (POD) is associated with impaired cognitive function, increased morbidity, and elevated mortality. Although preoperative nutritional impairment has been associated with POD, the specific association between the objective, laboratory-based Controlling Nutritional Status (CONUT) score and POD, including its dose-response pattern, remains insufficiently characterized in elderly patients with hip fractures. This study aimed to evaluate the association between preoperative CONUT score and POD in this population.