EGFR and non-small cell lung carcinoma: These findings are in agreement with previous reports on risk factors for NSCLC.[9, 14, 27, 30–33] Nonsmoking history has been identified as a prognostic indicator in many studies.[34–36] Our results revealed that for patients with either EGFR mutation positive or wild-type, the association between smoking status and survival remains significant in the presence of strong predictors, such as treatment and ECOG performance scores.