Efficacy and safety of first-line nivolumab plus ipilimumab treatment in elderly patients (aged ≥ 75 years) with non-small cell lung cancer

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PURPOSE: Nivolumab plus ipilimumab (Nivo-Ipi) combination therapy is an effective first-line treatment for advanced non-small cell lung cancer (NSCLC). However, its effectiveness and feasibility in elderly patients (aged ≥ 75 years) remain unclear. This study aimed to investigate the efficacy and safety of first-line Nivo-Ipi therapy in elderly patients with NSCLC. METHODS: This retrospective study included 57 patients with NSCLC (52 men and 5 women), aged ≥ 75 years (range: 75-86) who received first-line Nivo-Ipi therapy from December 2020 to November 2022 at four institutes in Japan. Patient characteristics, therapeutic efficacy, and the incidence and severity of adverse events (AE) were assessed. RESULTS: The overall response rate was 42.1%, the disease control rate was 73.6%, the median progression-free survival (PFS) was 7.1 months, and the median overall survival (OS) was 14.1 months. Common Grade ≥ 3 AEs included pneumonitis, elevated aspartate transaminase, elevated alanine transaminase, adrenal insufficiency, and colitis. No treatment-related deaths were reported. PFS and OS were longer in patients who experienced treatment-related AEs. Patients with and without AEs had a median PFS of 11.7 and 2.8 months, respectively. Similarly, the median OS of patients with and without AEs was 20.4 and 9.0 months, respectively. CONCLUSION: First-line Nivo-Ipi therapy is effective in elderly patients with NSCLC. Although there was an increased incidence of pneumonitis, the treatment was manageable and presented as a viable treatment option. Notably, the occurrence of treatment-related AEs was associated with improved clinical outcomes, suggesting a potential prognostic value of AEs in this population.

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