Sensitivity analyses were conducted additionally adjusting for antibiotic use in the past year; excluding patients with antibiotics use in the past year (n = 17) and patients who received neo‐adjuvant treatment (n = 23), respectively; stratifying analysis by recruitment site (HCI, HD); and examining the associations between Fn abundance with onset of cachexia, using “Fn negative” as the reference level. This evidence concerns the gene FN1 and Cachexia.