EGFR and non-small cell lung carcinoma: In addition, in the subgroup analysis according to the gender, the significant correlation between TTF-1 expression and EGFR mutations was observed not only in female (OR = 4.87, 95% CI 2.27–10.45, p < 0.0001), but also in male patients with NSCLC (OR = 3.34, 95% CI 1.43–6.82, p = 0.0009).