EGFR and non-small cell lung carcinoma: Some common patient or disease characteristics, such as gender [6], performance status [6], ethnicity [7], brain metastasis [8], and type of EGFR mutation [9] may have an independent prognostic value in EGFR-mutant NSCLC, but some of these variables may be also predictive of EGFR-TKI efficacy, as shown in published meta-analyses of randomized control trials (RCTs) [10,11,12].