Risk factors, complications and survival after upper abdominal surgery: a prospective cohort study

Area of Science:

• Surgical Oncology
• Clinical Nutrition
• Medical Imaging

Background:

• Preoperative weight loss and low serum albumin are linked to poorer outcomes in surgery.
• The prognostic value of body composition (muscle, fat) and postoperative complications is debated.
• This study examines preoperative body composition and complications against survival in upper abdominal surgery.

Purpose of the Study:

• To evaluate the association between preoperative body composition, major non-fatal complications, and overall survival.
• To compare the predictive power of body composition indices with established prognostic factors.
• To analyze data from a large cohort undergoing upper abdominal surgery.

Main Methods:

• Analysis of 447 patients from a Norwegian multicenter randomized controlled trial (2001-2006).
• Prospective cohort analysis with overall survival data from the National Population Registry.
• Calculation of body composition indices from preoperative CT scans.

Main Results:

• Low preoperative serum albumin (<35 g/l) and weight loss (>5%) were independently associated with reduced survival.
• No significant association was found between preoperative body composition indices and survival.
• Major postoperative complications were linked to reduced survival when early deaths (within 90 days) were included.

Conclusions:

• Preoperative serum albumin and weight loss remain robust predictors of prognosis in upper abdominal surgery.
• Body composition indices were not beneficial as general indicators of poor prognosis.
• Non-fatal postoperative complications did not correlate with long-term survival in this cohort.