Blood parameters demonstrating a significant survival impact in patients with locally advanced NSCLC undergoing definitive chemoradiotherapy

Abstract

Aim: We investigated blood parameters in patients with inoperable stage III non-small cell lung cancer (NSCLC) to predict individual outcomes after definitive chemo - radiotherapy (CRT). Patients and Methods: Blood parameters of consecutive patients undergoing definitive CRT between 2010 and 2016 for inoperable stage III NSCLC before multimodal treatment and at first follow-up were measured and analyzed. Results: Blood parameters from 99 patients were evaluated. Histologically, about 50% of patients had an adenocarcinoma. All patients received platinum-based sequential or concurrent CRT. The median total dose to the primary tumor was 60 (range=48-70) Gy. On multivariate analysis after adjustment for all co-founders, median overall survival for pre-treatment cutoffs were: lactate dehydrogenase (LDH) >250 U/l was 17 vs. 27 months [hazard ratio (HR)=2.05, 95% confidence intervaI (CI)=1.15-3.66; p=0.015], thrombocytosis >400×106/l: 11 vs. 23 months (HR=2.75, 95% CI=1.1-6.88; p=0.03), hypoalbuminemia <3.5 g/dl: 12 vs. 24 months (HR=2.42, 95% CI=1.21-4.84; p=0.013) and post-treatment neutrophilia >7×106/l: 12 vs. 27 months (HR=2.5, 95% CI=1.21-5.17; p=0.013). Conclusion: Pre-treatment elevated LDH, thrombocytosis, hypoalbuminemia and post-treatment neutrophilia were associated with significantly worse overall survival in patients with inoperable stage III NSCLC treated with CRT. Patients with both pre-therapeutic elevated LDH and hypoalbuminemia demonstrated a dismal prognosis despite completion of multimodal treatment.