Yoshitaka Saito1, Yoh Takekuma1, Naofumi Shinagawa2, Mitsuru Sugawara3,4. 1. Department of Pharmacy, Hokkaido University Hospital, Kita 14-jo, Nishi 5-chome, Kita-ku, Sapporo, 060-8648, Japan. 2. Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Kita 15-jo, Nishi 7-chome, Kita-ku, Sapporo, 060-8638, Japan. 3. Department of Pharmacy, Hokkaido University Hospital, Kita 14-jo, Nishi 5-chome, Kita-ku, Sapporo, 060-8648, Japan. msuga@med.hokudai.ac.jp. 4. Faculty of Pharmaceutical Sciences, Laboratory of Pharmacokinetics, Hokkaido University, Kita 12-jo, Nishi 6-chome, Kita-ku, Sapporo, 060-0812, Japan. msuga@med.hokudai.ac.jp.
Abstract
PURPOSE: Carboplatin (CBDCA) + nanoparticle albumin-bound paclitaxel (nab-PTX) is one of the most effective chemotherapeutic regimens for advanced non-small cell lung cancer (NSCLC) treatment. However, neutropenia and neuropathy are well-known dose-limiting toxicities associated with this regimen, frequently resulting in treatment suspension and dose reduction. In the present study, we aimed to identify risk factors associated with CBDCA + nab-PTX treatment suspension. METHODS: Patients with NSCLC who received CBDCA + nab-PTX ± atezolizumab or pembrolizumab regimens were retrospectively evaluated. The risk factor(s) for treatment suspension and primary causes underlying suspension during the first course were assessed; the relative dose intensity (RDI) was compared between patients with and without identified factors. RESULTS: The frequency of treatment suspension was determined as 55%. The causes for suspension were neutropenia (65.2%), infection (24.2%), thrombocytopenia (6.1%), and other conditions. The calculated RDI was 98.5% for CBDCA and 79.3% for nab-PTX. Based on univariate and multivariate analyses, grade 1 or higher liver dysfunction was identified as a risk factor for treatment suspension. We determined primary causes for treatment suspension as neutropenia and/or infection, as they are closely related. Next, we evaluated associated factors and determined age ≥65 years and performance status (PS) 2 as potential factors, in addition to liver dysfunction. CONCLUSION: We observed that liver dysfunction at baseline is a risk factor for treatment suspension. In addition, age ≥65 years and PS 2 can result in treatment suspension owing to neutropenia and/or infection during CBDCA + nab-PTX treatment.
PURPOSE: Carboplatin (CBDCA) + nanoparticle albumin-bound paclitaxel (nab-PTX) is one of the most effective chemotherapeutic regimens for advanced non-small cell lung cancer (NSCLC) treatment. However, neutropenia and neuropathy are well-known dose-limiting toxicities associated with this regimen, frequently resulting in treatment suspension and dose reduction. In the present study, we aimed to identify risk factors associated with CBDCA + nab-PTX treatment suspension. METHODS: Patients with NSCLC who received CBDCA + nab-PTX ± atezolizumab or pembrolizumab regimens were retrospectively evaluated. The risk factor(s) for treatment suspension and primary causes underlying suspension during the first course were assessed; the relative dose intensity (RDI) was compared between patients with and without identified factors. RESULTS: The frequency of treatment suspension was determined as 55%. The causes for suspension were neutropenia (65.2%), infection (24.2%), thrombocytopenia (6.1%), and other conditions. The calculated RDI was 98.5% for CBDCA and 79.3% for nab-PTX. Based on univariate and multivariate analyses, grade 1 or higher liver dysfunction was identified as a risk factor for treatment suspension. We determined primary causes for treatment suspension as neutropenia and/or infection, as they are closely related. Next, we evaluated associated factors and determined age ≥65 years and performance status (PS) 2 as potential factors, in addition to liver dysfunction. CONCLUSION: We observed that liver dysfunction at baseline is a risk factor for treatment suspension. In addition, age ≥65 years and PS 2 can result in treatment suspension owing to neutropenia and/or infection during CBDCA + nab-PTX treatment.
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