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Originally published as JCO Early Release 10.1200/JCO.2005.05.0294 on October 10 2006 © 2006 American Society of Clinical Oncology. Phase III Trial Comparing Three Doses of Docetaxel for Second-Line Treatment of Advanced Breast Cancer
From the Department of Oncology, Auckland Hospital, Auckland; Department of Oncology, Christchurch Hospital, Christchurch, New Zealand; Department of Oncology, Rigshospitalet, Copenhagen; Department of Oncology, Vejle Sygehus, Vejle; Department of Oncology, Odense Universitetssygehus, Odense, Denmark; Department of Oncology, Petrov Research Institute of Oncology, St Petersburg; Department of Oncology, Research Institute of Diagnostics and Surgery, Moscow, Russian Federation; and Sanofi-Aventis, Antony, France; Sanofi-Aventis, Antony, France Address reprint requests to Vernon Harvey, MD, Department of Oncology, Auckland Hospital, Private Bag 92-024, Auckland, New Zealand; e-mail: vernonh{at}adhb.govt.nz Purpose: To evaluate whether a relationship exists between docetaxel dose and clinical response in the treatment of patients with advanced breast cancer. Patients and Methods: Patients whose cancer had progressed after one prior chemotherapy regimen for advanced breast cancer or had recurred during or within 6 months of adjuvant chemotherapy were randomly assigned to docetaxel 60, 75, or 100 mg/m2 intravenously every 3 weeks. Results: Five hundred twenty-seven patients were randomly assigned (intent to treat [ITT]), and 524 were assessable for toxicity. In the population assessable for efficacy (n = 407), logistic regression analysis showed that increasing docetaxel dose was significantly associated with higher response rate (P = .007) and improved time to progression (TTP; P = .014). In the ITT analysis, a significant dose-response relationship was observed for tumor response (P = .026) but not for TTP (P = .067). The incidences of most hematologic and nonhematologic toxicities were related to increasing dose, with grade 3 to 4 neutropenia occurring in 76.4%, 83.7%, and 93.4% and febrile neutropenia occurring in 4.7%, 7.4%, and 14.1% of patients administered the 60, 75, and 100 mg/m2 doses, respectively. One death was considered treatment related. Conclusion: A relationship between increasing dose of docetaxel and increased tumor response was observed across the dose range of 60 to 100 mg/m2 every 3 weeks. Toxicities were related to increasing dose. Depending on the therapy goal, any of the doses studied may be appropriate for second-line treatment of advanced breast cancer. published online ahead of print at www.jco.org on October 10, 2006. Supported by Sanofi-Aventis, Paris, France. Authors' disclosures of potential conflicts of interest and author contributions are found at the end of this article. This article has been cited by other articles:
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Copyright © 2006 by the American Society of Clinical Oncology, Online ISSN: 1527-7755. Print ISSN: 0732-183X
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