A Study of ASP8273 vs. Erlotinib or Gefitinib in First-line Treatment of Patients With Stage IIIB/IV Non-small Cell Lung Cancer Tumors With EGFR Activating Mutations

The purpose of the study was to evaluate the progression free survival (PFS), based on independent radiologic review (IRR), of ASP8273 compared to erlotinib or gefitinib in patients with locally advanced, metastatic or unresectable stage IIIB/IV adenocarcinoma non-small cell lung cancer (NSCLC) with epidermal growth factor receptor (EGFR) activating mutations. This study also assessed Overall survival (OS); Overall response rate (ORR) as assessed by IRR; PFS as assessed by the investigator; Disease control rate (DCR) as assessed by IRR; Duration of Response (DOR) by IRR; Safety of ASP8273; and Quality of Life (QOL) and patient-reported outcome (PRO) parameters.