C-reactive protein is a significant predictor of improved survival in patients with advanced non-small cell lung cancer.

This study tries to evaluate the associations between circulating C-reactive protein (CRP) and the overall survival of patients with non-small cell lung cancer (NSCLC). One hundred ninety-two patients with advanced NSCLC who treated with chemotherapy were enrolled in this study. The cut-off value of CRP concentration was 5.0 mg/L. The patients were divided into low, intermediate and high 3 groups respectively according to the baseline level of CRP before the treatment. Kaplan–Meier analysis and Cox proportional-hazard models were used to evaluate the relationship between the CRP and overall survival time of patients. After adjusting for age, gender, smoking history, pathologic type, CRP was a significant independent impact which predicts the survival prognosis of patients with NSCLC. For all patients, the hazard ratio with high CRP levels for NSCLC-specific survival was 1.83 [95%confidenceinterval (CI) = 0.96, 3.48] compared with low CRP levels. The level of CRP was significantly correlated with survival time (hazard ratio = 1.77; 95% CI = 0.73, 4.26) for the patient with first-line chemotherapy. Patients with high level of circulating CRP also responded poorly to chemotherapy. A high level of circulating CRP was associated with a poor response and worse survival in patients with NSCLC.