CRP and neoplasm: The results showed that Age (p < 0.001), Sex (p = 0.0041), Hemoglobin (p < 0.001), ASA score (p = 0.048), C-reactive protein (p = 0.001), ECOG score (p = 0.005), NRS2002 (p < 0.001), LCR (p < 0.001), and Tumor location (p = 0.003) were associated with the occurrence of anastomotic leakage.