(A) The progression-free survival curve of all patients of our cohort. (B) The progression-free survival curve of patients who received any EGFR-TKI-based therapy (either monotherapy or combination therapy; n = 69) versus chemotherapy (n = 35). (C) The progression-free survival curve of four groups: EGFR-TKI monotherapy (n = 48), EGFR-TKI combined with chemotherapy (n = 12), EGFR-TKI combined with crizotinib (n = 9), and chemotherapy (n = 35).
EGFR, epidermal growth factor receptor; TKI, tyrosine kinase inhibitor.