BM: brain metastases; EGFR: epidermal growth factor receptor; Mut: mutated; WT: wild type; OR: odds ratio; CI: confidence interval. Non-adenocarcinoma group included squamous cell carcinoma, large cell carcinoma and NSCLC-not otherwise specified in this analysis. # Uncommon mutation was not shown in the EGFR pairwise comparison due the small number of patients. In addition, the pairwise comparison was made in another multivariable logistic regression model. §Category after the slash (/) was set as reference category; * indicated significant at P < 0.0125 level in the multivariable model.