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Purpose Non-small-cell lung cancer (NSCLC) is the most diagnosed lung cancer and is associated with poor prognosis. This study aimed to analyze whether fasting blood glucose (FBG) levels could provide prognostic information in Chinese patients with NSCLC, using the Suzhou Lung Cancer Survival study. Patients and methods A prospective cohort study of adult patients with primary NSCLC was performed. The patients who were hospitalized between January 2016 and April 2018 in two hospitals affiliated with Soochow University were recruited. Patient information, including lifestyle habits and clinical and laboratory data, were collected through face-to-face interviews and evaluation of medical records. Follow-up was initiated from the date of patient enrollment until May 8, 2018 or until patient death. The long-term survival of patients was assessed every 6 months. Patient vital status was confirmed by using hospital records, telephone interview, or local death registration system. Cox proportional hazards regression was used to estimate hazard ratio and 95% confidence interval (CI) for death, with adjustment for cancer stage, medical treatments, smoking, and other potential confounders. Results A total of 387 patients were included in the analysis, and the numbers (percentages) of patients with stages I, II, III, and IV NSCLC were 53 (13.7%), 41 (10.6%), 64 (16.5%), and 215 (55.6%), respectively. The median duration of follow-up was 19.1 months. Compared with patients in the second tertile of FBG, the HRs for mortality were 2.16 (95% CI: 1.26-3.73) and 1.87 (95% CI: 1.03-3.42) for those in the lowest one and diabetic group, respectively. Subgroup analysis according to various patient characteristics confirmed these associations. Conclusion Diabetes and low FBG could be important predictors of death in patients with NSCLC. Maintaining appropriate blood glucose levels may improve prognosis in patients with NSCLC.

Non-small cell lung cancer (NSCLC) is the most commonly diagnosed lung cancer and is associated with poor prognosis. This study aimed to analyze if serum C-reactive protein (CRP), albumin (Alb), and CRP/Alb ratio could provide prognostic information in patients with NSCLC. 387 patients with primary NSCLC were included in this analysis. Cox proportional hazards regression was used to estimate hazard ratio (HR) and 95% confidence interval (CI) of death with adjustment for some potential confounders. The multivariate regression analyses revealed the statistically significant associations of decreased survival of patients with NSCLC with elevated CRP, decreased Alb, and elevated CRP/Alb ratio. The HRs of mortality were 1.56 (95% CI: 0.80–3.04) and 2.64 (95% CI: 1.35–5.16) for patients in the second and the highest tertiles of CRP (P-trend = 0.003). For albumin, the HR was 0.50 (95% CI: 0.29–0.85) for the normal group. The CRP/Alb ratio strongly predicted the survival of patients in the highest tertile with a fourfold risk of dying compared with those in the lowest tertile (HR = 4.14, 95% CI: 2.15–7.98). The subgroup analysis according to various patient characteristics confirmed these associations. In conclusion, serum CRP, albumin, and CRP/Alb ratio are predictive of survival for Chinese patients with NSCLC.