For stage IIIB-IV NSCLC patients, the presence of mutated-EGFR was significantly associated with the occurrence of SBM as compared to that of WT-EGFR (HR = 2.98, 95% CI, 1.50-5.93, P = 0.002) after adjusting age (HR = 2.00, 95% CI =1.16-3.45, P = 0.012) and other common demographic covariates (Table 3). This evidence concerns the gene EGFR and non-small cell lung carcinoma.