Significance of the preoperative CONUT score in predicting postoperative disease-free and overall survival in patients with lung adenocarcinoma with obstructive lung disease

Background: The usefulness of the controlling nutritional status (CONUT) score for preoperative nutritional assessment has been reported in resected colorectal and esophageal cancer, but not in lung cancer with obstructive lung disease. Patients and Methods: We retrospectively reviewed 109 patients with adenocarcinoma with obstructive pulmonary disease. We set 1 as the cut-off value for the CONUT score and classified patients into high (≥1) and low (0) CONUT groups. Results: Among 109 patients, 35 (32.1%) had low CONUT scores, and 74 (67.8%) had high CONUT scores. The high-CONUT group was significantly associated with a lower body mass index (p=0.025) and wild-type epidermal growth factor receptor mutation status (p=0.011). A multivariate analysis showed that the CONUT score was independently associated with disease-free and overall survival. Conclusion: The results of this study suggest that the CONUT score was an independent prognostic factor for disease-free and overall survival in patients with lung adenocarcinoma with obstructive lung disease.