YBX1 and lung adenocarcinoma: The multivariate Cox proportional hazards model analysis showed that high TNM stage (Hazard Ratio [HR]=2.369, 95% confidence interval [CI]: 1.110-5.055, p=0.026) and high YB-1 expression (HR=2.638, 95% CI: 1.214-5.733, p=0.014) were independent prognostic risk factors in lung adenocarcinoma (Table 4).