MYC and chronic obstructive pulmonary disease: In univariate analysis, gender (male vs. female, hazard ratio (HR) = 1.954, confidence interval (CI) 95% 1.209–3.158, p = 0.006), COPD (HR 1.712, CI 95% 1.059–2.77, p = 0.028), and positive C-Myc expression (HR 1.774, CI 95% 1.099–2.865, p = 0.019) were clear risk factors for shorter OS while adjuvant treatment (HR 0.456, CI 95% 0.255–0.815, p = 0.008) represented a significant predictor of longer OS.