Univariate regression analysis indicated that age, EGFR mutation, triple negative status, disease stage and risk score were significantly associated with the DFS of NSCLC patients in GSE31210; WHO performance status and risk score were significantly associated with the DFS of patients in GSE37745; and stage and risk score were related to the DFS of patients in GSE50081. This evidence concerns the gene EGFR and non-small cell lung carcinoma.