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Kaplan-Meier survival curves for OS. (A) OS in the whole population; (B) OS according to Mandard Tumor Regression Grade after induction chemotherapy; (C) OS according to patient’s PS ECOG; (D) OS according to the number of metastatic sites; (E) OS according to the five-factors prognostic score. OS, Overall Survival; NR, Not Reached; PS, Performance Status; ECOG Eastern Cooperative Oncology Group; mOS, Median Overall Survival; mo, Months; CI, Confidence Interval; HR, Hazard ratio.
