Clinical characteristics and <i>EGFR</i> mutation status rates categorised by smoking status and sex.

<p>11 patients with unknown smoking status, and 6 who had samples indeterminate for <i>EGFR</i> mutational status were excluded. 464/762 (60.9%) tested positive for <i>EGFR</i> mutations (<i>EGFR</i> M+). The number of patients needed to test in order to pick up 1 <i>EGFR</i> mutant lung adenocarcinoma in any sub-population stratified by sex and smoking status, was less than 3 patients (male ES; 1/0.357 = 2.8).