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Kaplan-Meier survival curves comparing time to progression (TTP) for wild-type vs epidermal growth factor receptor–mutated cases (A), chromogenic in situ hybridization (CISH) copy number–negative vs copy number–positive cases (B), fluorescence in situ hybridization (FISH) copy number–negative vs copy number–positive cases (C), and immunohistochemical (IHC) score–negative vs IHC score–positive cases (D). A, P = .0004; B, P = .5; C, P = 1; D, P = .9. PFS, progression-free survival.
