Fig. 1

(A) Kaplan-Meier estimates of progression-free survival in all patients. (B) Subgroup analysis of progression-free survival. (C) Kaplan-Meier estimates of progression-free survival in patients treated with first-line 1st /2nd and 3rd generation EGFR-TKIs. (D) Kaplan-Meier estimates of progression-free survival in patients with and without brain metastases. Tick marks indicate censored data. CI, confidence interval; HR, hazard ratio; mPFS, median PFS