• Chung-Yu Chen, Kuan-Yu Chen, Jin-Yuan Shih, and Chong-Jen Yu.
• Division of Pulmonary Medicine, Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University Hospital Yun-Lin Branch, Yun-Lin County, Taiwan.
• J Formos Med Assoc. 2020 Oct 1; 119 (10): 1506-1513.

BackgroundThis study was to explore the clinical factors associated with treatment toxicities of pemetrexed plus platinum in elderly patients with non-small cell lung cancer (NSCLC).MethodsChemo-naive patients aged ≥ 70 with advanced NSCLC treated with pemetrexed plus platinum were included. Medical records were reviewed and clinical data, including age, gender, smoking status, comorbidities, EGFR mutation status, chemotherapy regimens, previous use of epidermal growth factor receptor-tyrosine kinase inhibitors, treatment-related hematologic, renal, and hepatic toxicities, and treatment responses, were analyzed. Comorbidity conditions were evaluated by using the Simplified Comorbidity Score (SCS) and Charlson Comorbidity Index Score (CCIS).ResultsA total of 144 patients were included. In the univariate analysis, patients with SCS >9 (p = 0.006) and cigarette smoking (p = 0.028) were associated with a significantly higher rate of grade 3/4 neutropenia than their counterpart. Carboplatin use was associated with a higher rate of grade 3/4 thrombocytopenia than cisplatin use (p = 0.028). In the multivariate analysis, SCS >9 was associated with a significantly higher risk of anemia of any grade (odds ratio [OR]: 2.72, 95% confidence interval [CI]: 1.09-6.77). Carboplatin use was associated a higher risk of any grade (OR: 4.61, 95% CI: 1.07-19.90) and grade 3/4 thrombocytopenia (OR: 7.37, 95% CI: 1.36-39.92). No clinical factors were found to be associated with hepatic and renal toxicities.ConclusionHigh SCS and carboplatin use were associated with hematological toxicities with pemetrexed plus platinum use in elderly patients with NSCLC.Copyright © 2019 Formosan Medical Association. Published by Elsevier B.V. All rights reserved.

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