Impact of Preoperative Nutritional Status on Surgical Outcomes in Major Abdominal Surgeries: A Prospective Cohort Study

Background: Malnutrition significantly impacts surgical outcomes, yet comprehensive evaluation of multiple nutritional parameters in major abdominal surgery remains limited. This study investigated the relationship between preoperative nutritional status and postoperative complications using multiple assessment tools and markers. Methods: In this prospective cohort study, 360 patients scheduled for major abdominal surgery underwent comprehensive nutritional assessment using Nutritional Risk Screening 2002 (NRS-2002), Subjective Global Assessment (SGA), anthropometric measurements, and biochemical markers. Primary outcomes included 30-day postoperative complications classified by Clavien-Dindo system. Secondary outcomes encompassed length of hospital stay, readmission rates, and wound complications.