Abstract
Purpose
The aim of this retrospective study was to evaluate via combined analysis the efficacy and safety of pemetrexed monotherapy for chemo-naïve elderly patients aged ≥80 with non-squamous non-small cell lung cancer (NSCLC).
Methods
We conducted a combined analysis from two phase II studies of pemetrexed for chemo-naïve elderly (aged ≥75) (n = 47) and performance status 2 (n = 28) patients with advanced non-squamous NSCLC. Population aged ≥80 (80+ Group) was compared to those aged 70–79 (70’s Group).
Results
We analyzed a total of 66 patients (37 70s and 29 80+ Groups) after exclusion of 4 ineligible and 5 aged ≤69 patients. Overall response rate, disease control rate, median progression-free survival, and median overall survival of 70s vs. 80+ Groups were 13.5 vs. 13.8% [p = not significant (NS)], 67.6 vs. 58.6% (p = 0.608), 3.7 months vs. 4.2 months (p = 0.5588) and 18.5 vs. 13.5 months (p = 0.2621), respectively. Non-hematological and hematological toxicities ≥grade 3 of 70s vs. 80+ Groups were 24 vs. 35% (p = 0.4192) and 49 vs. 52% (p = NS), respectively. Dose reduction and/or delay due to toxicities of 70s vs. 80+ Groups was 19 vs. 28% (p = 0.7784). Febrile neutropenia and interstitial lung disease were not observed. Treatment-related death (bacterial pneumonia) was confirmed in one (3%) of 29 80+ Group patients.
Conclusions
Pemetrexed monotherapy demonstrated similar efficacy and safety between aged ≥80 and aged 70–79 populations. It could be a therapeutic option in clinical practice for elderly non-squamous NSCLC patients aged ≥80 without indications of carboplatin-based combination regimens or docetaxel monotherapy.
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Acknowledgements
We thank Mr. David Martin for his writing support and Ms. Mizuho Edagawa and Ms. Konomi Mizushima for data collection and management.
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Funding
This study was partly supported by Foundation for Biomedical Research and Innovation.
Conflict of interest
Akito Hata, Nobuyuki Katakami, Miyako Satouchi, and Satoshi Morita have received a speaker honorarium from Eli Lilly. The other authors have declared no conflicts of interest.
Ethical approval
This study was approved by the independent Institute Research Ethics Committee at Institute of Biomedical Research and Innovation Hospital and conducted in accordance with the Declaration of Helsinki. All patients in original studies signed informed consent before participation.
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Hata, A., Katakami, N., Hattori, Y. et al. Pemetrexed monotherapy for chemo-naïve elderly (aged ≥80) patients with non-squamous non-small cell lung cancer: results from combined analysis of two single arm phase II studies (HANSHIN002 and 003). Cancer Chemother Pharmacol 79, 689–695 (2017). https://doi.org/10.1007/s00280-017-3259-z
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DOI: https://doi.org/10.1007/s00280-017-3259-z