Objective: To assess outcomes of elderly patients with advanced NSCLC harboring an EGFR mutation treated with gefitinib, as well as safety and impact on quality of life (QoL).
Methods: We performed a retrospective analysis of pooled data from one Phase III and two Phase II studies of 71 patients aged ≥ 70 years with a performance status of 0 - 2. The main outcome measures were progression-free survival (PFS), overall survival (OS) and response rate (RR), as well as incidence of adverse events and time to 9.1% deterioration in QoL.
Results: Median PFS (14.3 vs 5.7 months, p < 0.001) and overall RR (73.2 vs 26.5%, p < 0.001) in the gefitinib group were superior to those in the standard chemotherapy group, whereas median OS was not significantly different (30.8 vs 26.4 months, p = 0.42). Elevation of aspartate transaminase and/or alanine transaminase (18.3%) was the most common adverse event, and one treatment-related death (pneumonitis) occurred. Time to 9.1% deterioration in the QoL domains of pain and dyspnea, anxiety, and daily functioning was similar between the two age groups.
Conclusion: First-line gefitinib is efficacious with acceptable toxicity in relatively fit elderly patients with advanced NSCLC harboring an EGFR mutation.
Keywords: EGFR tyrosine kinase inhibitors; NSCLC; elderly patients; gefitinib.