Comprehensive nutritional index predicts clinical outcomes for esophageal squamous cell carcinoma receiving neoadjuvant immunotherapy combined with chemotherapy.

Abstract

No study has reported the clinical outcomes of comprehensive nutritional index (CNI) in esophageal squamous cell carcinoma (ESCC) receiving neoadjuvant immunotherapy combined with chemotherapy (nICT). This retrospective study involved 233 ESCC patients who underwent nICT. Principal component analysis was performed to establish the CNI based on 5 indexes including body mass index, usual body weight percentage, total lymphocyte count, albumin and hemoglobin. The relationships between the CNI and therapeutic response, postoperative complications and prognosis were analyzed. One hundred and forty-nine and 84 patients were assigned to the high and low CNI group, respectively. The incidences of respiratory complications (33.3% vs. 18.8%, P=0.013) and vocal cord paralysis (17.9% vs. 8.1%, P=0.025) in low CNI were significantly higher than those in high group, respectively. Seventy (30.0%) patients achieved pathological complete response (pCR). High CNI patients achieved a better pCR rate than those with low CNI (41.6% vs. 9.5%, P<0.001). The CNI served as an independent pCR predictor [odds ratio (OR)=0.167, 95% confidence interval (CI)=0.074-0.377, P<0.001)]. High CNI patients had better 3-year disease-free survival (DFS) (85.4% vs. 52.6%, P<0.001) and overall survival (OS) (85.5% vs. 64.5%, P<0.001) than those with low CNI, respectively. The CNI served as an independent prognostic score regarding DFS [hazard ratio (HR)=3.878, 95% CI=2.214-6.792, P<0.001)] and OS (HR=4.386, 95% CI=2.006-9.590, P<0.001). Based on nutrition-related indicators, the pretreatment CNI serves as a sensitive and effective predictor of therapeutic response, postoperative complications and prognosis in ESCC receiving nICT.