The median iPFS for NSCLC patient was relatively longer than the whole PFS of icotinib and gefitinib treatment, about 8.4 months (95% CI, 5.4 to 11.3 months) and 10.6 months (95% CI, 6.3 to 14.8 months), respectively, with no statistically significant difference among the two EGFR-TKIs treatment (P = 0.17) (Fig. 3). The gene discussed is EGFR; the disease is non-small cell lung carcinoma.