In addition, univariate analysis of disease-free survival (DFS) of patients with NSCLC showed that advanced TNM stage, large tumor, lymph node metastasis, no adjuvant chemotherapy, no adjuvant radiotherapy, and high SOD1 expression predicted poorer DFS, while TNM stage (HR, 2.055; 95% CI, 1.100–3.840; p = 0.024), adjuvant radiation therapy (HR, 0.497; 95% CI, 0.263–0.940; P = 0.032), and SOD1 expression (HR, 1.605; 95% CI, 1.056–2.440; P = 0.027) were independent prognostic factors for DFS on multivariate analysis. The gene discussed is SOD1; the disease is non-small cell lung carcinoma.