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Annals of Oncology

Year: 2009  |  Volume: 20  |  Issue: 7  |  Page No.: 1210 - 1215

Phase III trial of doxorubicin plus cyclophosphamide (AC), docetaxel, and alternating AC and docetaxel as front-line chemotherapy for metastatic breast cancer: Japan Clinical Oncology Group trial (JCOG9802)

N Katsumata, T Watanabe, H Minami, K Aogi, T Tabei, M Sano, N Masuda, J Andoh, T Ikeda, T Shibata and S. Takashima

Abstract

Background: This randomized, multicenter, phase III trial compared doxorubicin plus cyclophosphamide (AC), single-agent docetaxel (D), and an alternating regimen of AC and docetaxel (AC–D) as first-line chemotherapy in metastatic breast cancer (MBC).

Patients and methods: Patients with MBC resistant to endocrine therapy were entered in a randomized study to receive either six cycles of AC (doxorubicin 40 mg/m2 plus cyclophosphamide 500 mg/m2), D (60 mg/m2), or alternating treatment with AC–D (i.e. three cycles of AC and three cycles of D). Treatment was administered every 3 weeks.

Results: A total of 441 patients were entered in a randomized study. Response rates were 30% for AC, 41% for D, and 35% for AC–D. The median times to treatment failure (TTFs) were 6.4, 6.4, and 6.7 months (one-sided log-rank test, P = 0.13 for AC versus D, P = 0.14 for AC versus AC–D) and median overall survival (OS) was 22.6, 25.7, and 25.0 months (P = 0.09 for AC versus D, P = 0.13 for AC versus AC–D) in the AC, D, and AC–D, respectively.

Conclusion: There was no difference in the TTF among the three arms. However, there was a trend toward a better response and better OS in the D than in the AC.

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