Prudence A Francis1, Olivia Pagani1, Gini F Fleming1, Barbara A Walley1, Marco Colleoni1, István Láng1, Henry L Gómez1, Carlo Tondini1, Eva Ciruelos1, Harold J Burstein1, Hervé R Bonnefoi1, Meritxell Bellet1, Silvana Martino1, Charles E Geyer1, Matthew P Goetz1, Vered Stearns1, Graziella Pinotti1, Fabio Puglisi1, Simon Spazzapan1, Miguel A Climent1, Lorenzo Pavesi1, Thomas Ruhstaller1, Nancy E Davidson1, Robert Coleman1, Marc Debled1, Stefan Buchholz1, James N Ingle1, Eric P Winer1, Rudolf Maibach1, Manuela Rabaglio-Poretti1, Barbara Ruepp1, Angelo Di Leo1, Alan S Coates1, Richard D Gelber1, Aron Goldhirsch1, Meredith M Regan1. 1. From the Peter MacCallum Cancer Centre, St. Vincent's Hospital, University of Melbourne, Melbourne, VIC, and Breast Cancer Trials Australia and New Zealand, University of Newcastle, Newcastle, NSW (P.A.F.), and the University of Sydney, Sydney (A.S.C.) - all in Australia; the Institute of Oncology of Southern Switzerland, Ospedale San Giovanni, Bellinzona (O.P.), Breast Cancer St. Gallen, St. Gallen (T.R.), and the International Breast Cancer Study Group Coordinating Center (R.M., M.R.-P., B.R., A.S.C.), University Hospital Inselspital (M.R.-P.), Bern - all in Switzerland; the University of Chicago Medical Center, Chicago (G.F.F.); the University of Calgary, Calgary, AB, Canada (B.A.W.); the Division of Medical Senology, European Institute of Oncology (M.C.), and the European Institute of Oncology and International Breast Cancer Study Group (A.G.), Milan, Ospedale Papa Giovanni XXIII, Bergamo (C.T.), Azienda Socio Sanitaria Territoriale Sette Laghi-Ospedale di Circolo and Fondazione Macchi, Varese (G.P.), Medical Oncology and Cancer Prevention, IRCCS, National Cancer Institute, Aviano (F.P., S.S.), the Department of Medicine, School of Medical Oncology, University of Udine, Udine (F.P.), Salvatore Maugeri Foundation, Pavia (L.P.), and the Hospital of Prato-Azienda Unità Sanitaria Locale Toscana Centro, Prato (A.D.L.) - all in Italy; the National Institute of Oncology, Budapest, Hungary (I.L.); Instituto Nacional de Enfermedades Neoplásicas, Lima, Peru (H.L.G.); University Hospital 12 de Octubre, Madrid (E.C.), Vall d'Hebron Institute of Oncology and Vall d'Hebron University Hospital, Barcelona (M.B.), and Instituto Valenciano de Oncologia, Valencia (M.A.C.) - all in Spain; the Susan F. Smith Center for Women's Cancers (H.J.B., E.P.W.) and the International Breast Cancer Study Group Statistical Center, Department of Biostatistics and Computational Biology (R.D.G., M.M.R.), Dana-Farber Cancer Institute, Harvard Medical School, the Harvard T.H. Chan School of Public Health, and Frontier Science and Technology Research Foundation (R.D.G.) - all in Boston; Institut Bergonié Comprehensive Cancer Center, Université de Bordeaux, Bordeaux, France (H.R.B., M.D.); the Angeles Clinic and Research Institute, Santa Monica, CA (S.M.); Massey Cancer Center, Virginia Commonwealth University School of Medicine, Richmond (C.E.G.); Mayo Clinic, Rochester, MN (M.P.G., J.N.I.); Johns Hopkins Sidney Kimmel Comprehensive Cancer Center, Baltimore (V.S.); Fred Hutchinson Cancer Research Center, University of Washington, Seattle (N.E.D.); Weston Park Hospital, Sheffield, United Kingdom (R.C.); and the Department of Obstetrics and Gynecology, University Medical Center, Regensburg, Germany (S.B.).
Abstract
BACKGROUND: In the Suppression of Ovarian Function Trial (SOFT) and the Tamoxifen and Exemestane Trial (TEXT), the 5-year rates of recurrence of breast cancer were significantly lower among premenopausal women who received thearomatase inhibitor exemestane plus ovarian suppression than among those who received tamoxifenplus ovarian suppression. The addition of ovarian suppression to tamoxifen did not result in significantly lower recurrence rates than those with tamoxifen alone. Here, we report the updated results from the two trials. METHODS:Premenopausal women were randomly assigned to receive 5 years of tamoxifen, tamoxifen plus ovarian suppression, or exemestane plus ovarian suppression in SOFT and to receive tamoxifen plus ovarian suppression or exemestane plus ovarian suppression in TEXT. Randomization was stratified according to the receipt of chemotherapy. RESULTS: In SOFT, the 8-year disease-free survival rate was 78.9% with tamoxifen alone, 83.2% with tamoxifenplus ovarian suppression, and 85.9% with exemestane plus ovarian suppression (P=0.009 for tamoxifen alone vs. tamoxifenplus ovarian suppression). The 8-year rate of overall survival was 91.5% with tamoxifen alone, 93.3% with tamoxifenplus ovarian suppression, and 92.1% with exemestane plus ovarian suppression (P=0.01 for tamoxifen alone vs. tamoxifenplus ovarian suppression); among the women who remained premenopausal after chemotherapy, the rates were 85.1%, 89.4%, and 87.2%, respectively. Among the women with cancers that were negative for HER2 who received chemotherapy, the 8-year rate of distant recurrence with exemestane plus ovarian suppression was lower than the rate with tamoxifen plus ovarian suppression (by 7.0 percentage points in SOFT and by 5.0 percentage points in TEXT). Grade 3 or higher adverse events were reported in 24.6% of the tamoxifen-alone group, 31.0% of the tamoxifen-ovarian suppression group, and 32.3% of the exemestane-ovarian suppression group. CONCLUSIONS: Among premenopausal women with breast cancer, the addition of ovarian suppression to tamoxifen resulted in significantly higher 8-year rates of both disease-free and overall survival than tamoxifen alone. The use of exemestane plus ovarian suppression resulted in even higher rates of freedom from recurrence. The frequency of adverse events was higher in the two groups that received ovarian suppression than in the tamoxifen-alone group. (Funded by Pfizer and others; SOFT and TEXT ClinicalTrials.gov numbers, NCT00066690 and NCT00066703 , respectively.).
RCT Entities:
BACKGROUND: In the Suppression of Ovarian Function Trial (SOFT) and the Tamoxifen and Exemestane Trial (TEXT), the 5-year rates of recurrence of breast cancer were significantly lower among premenopausal women who received the aromatase inhibitor exemestane plus ovarian suppression than among those who received tamoxifen plus ovarian suppression. The addition of ovarian suppression to tamoxifen did not result in significantly lower recurrence rates than those with tamoxifen alone. Here, we report the updated results from the two trials. METHODS: Premenopausal women were randomly assigned to receive 5 years of tamoxifen, tamoxifen plus ovarian suppression, or exemestane plus ovarian suppression in SOFT and to receive tamoxifen plus ovarian suppression or exemestane plus ovarian suppression in TEXT. Randomization was stratified according to the receipt of chemotherapy. RESULTS: In SOFT, the 8-year disease-free survival rate was 78.9% with tamoxifen alone, 83.2% with tamoxifen plus ovarian suppression, and 85.9% with exemestane plus ovarian suppression (P=0.009 for tamoxifen alone vs. tamoxifen plus ovarian suppression). The 8-year rate of overall survival was 91.5% with tamoxifen alone, 93.3% with tamoxifen plus ovarian suppression, and 92.1% with exemestane plus ovarian suppression (P=0.01 for tamoxifen alone vs. tamoxifen plus ovarian suppression); among the women who remained premenopausal after chemotherapy, the rates were 85.1%, 89.4%, and 87.2%, respectively. Among the women with cancers that were negative for HER2 who received chemotherapy, the 8-year rate of distant recurrence with exemestane plus ovarian suppression was lower than the rate with tamoxifen plus ovarian suppression (by 7.0 percentage points in SOFT and by 5.0 percentage points in TEXT). Grade 3 or higher adverse events were reported in 24.6% of the tamoxifen-alone group, 31.0% of the tamoxifen-ovarian suppression group, and 32.3% of the exemestane-ovarian suppression group. CONCLUSIONS: Among premenopausal women with breast cancer, the addition of ovarian suppression to tamoxifen resulted in significantly higher 8-year rates of both disease-free and overall survival than tamoxifen alone. The use of exemestane plus ovarian suppression resulted in even higher rates of freedom from recurrence. The frequency of adverse events was higher in the two groups that received ovarian suppression than in the tamoxifen-alone group. (Funded by Pfizer and others; SOFT and TEXT ClinicalTrials.gov numbers, NCT00066690 and NCT00066703 , respectively.).
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