The role of chemoendocrine agents in postoperative adjuvant therapy for breast cancer: Meta-analysis of the first collaborative studies of postoperative adjuvant chemoendocrine therapy for breast cancer (ACETBC)
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The first collaborative studies of postoperative adjuvant chemoendocrine therapy for breast cancer (ACETBC) were carried out in 6 regions of Japan from 1982 to 1985, and the results were subjected to meta-analysis.
Subjects consisted of Stage II and IIIa cases who underwent radical mastectomy with Brt + Ax or more extensive resection for primary breast cancer.
Regimen A consisted of tegafur (Futraful: FT) alone at 600 mg/day, and regimen B of FT at 600 mg/day with tamoxifen (TAM) at 20 mg/day. The duration of the treatment was one year in the Tohoku and Kinki regions, and 2 years in the other 4 regions.
Meta-analysis by Peto’s method showed an odds reduction of 20 ± 7% (logrank test:P = 0.0069) for the 5-year overall survival rate in 4740 eligible patients, and 25 ± 6% (logrank test: P>0.0001) for the 5-year disease-free survival rate. The odds reductions were both statistically significant, indicating that the adjuvant chemoendocrine therapy was effective. Subset analysis of data on 5 - year disease-free survival showed that FT plus TAM therapy was better in ER-positive and postmenopausal patients, whether axillary lymph nodes were positive or negative.
Key wordsMeta-analysis Postoperative adjuvant chemoendocrine therapy Breast cancer Tegafur (Futraful) Tamoxifen
Adjuvant chemoendocrine therapy for breast cancer
CycIophosphamide, adriamycin, 5-FU
Cyclophosphamide, methotrexate, 5-FU
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