The present study aims to investigate the prognostic value of preoperative fat-free mass index for postoperative outcomes in patients undergoing esophagogastric cancer surgery, and to explore the role of the FFMI in the Global Leadership Initiative on Malnutrition (GLIM) criteria.

The GLIM criteria of malnutrition as a consensus lack of optimal combination in clinical validation. After the publication of the GLIM consensus, few studies have examined the effect of reduced FFMI on the clinical prognosis of patients with esophagogastric cancer, and whether the FFMI can be used as an effective diagnostic criterion of malnutrition in esophagogastric cancer needs to be further studied.

Therefore, the present study aims were to investigate the prognostic value of preoperative fat-free mass index for postoperative outcomes in patients undergoing esophagogastric cancer surgery, and to explore the role of the FFMI in the GLIM consensus for malnutrition.

Inclusion Criteria:

Elective surgery for esophagogastric cancer (there was a clear pathological diagnosis before surgery); NRS2002≥3; Preoperative BIA examination was performed.

Exclusion Criteria:

Discharged from a hospital within 24 hours; No BIA examination and not suitable for BIA examination (such as ascites, edema, amputation and pace-maker); Hepatic insufficiency (alanine transaminase/aspartate transaminase ratio 200% above normal range or bilirubin>3mg/dL) ; Renal insufficiency (serum creatinine>1.5mg/dL); Emergency operation; Pregnancy; Missing the postoperative information follow-up data.

Elective surgery for esophagogastric cancer (there was a clear pathological diagnosis before surgery)