Title
Absolute improvements in freedom from distant recurrence to tailor adjuvant endocrine therapies for premenopausal women: Results from TExT and Soft
Date Issued
20 April 2020
Access level
open access
Resource Type
journal article
Author(s)
Pagani O.
Francis P.A.
Fleming G.F.
Walley B.A.
Viale G.
Colleoni M.
Láng I.
Tondini C.
Pinotti G.
Di Leo A.
Coates A.S.
Goldhirsch A.
Gelber R.D.
Regan M.M.
Publisher(s)
American Society of Clinical Oncology
Abstract
PURPOSE The Tamoxifen and Exemestane Trial (TEXT)/Suppression of Ovarian Function Trial (SOFT) showed superior outcomes for premenopausal women with hormone receptor (HR)–positive breast cancer treated with adjuvant exemestane plus ovarian function suppression (OFS) or tamoxifen plus OFS versus tamoxifen alone. We previously reported the magnitude of absolute improvements in freedom from any recurrence across a continuous, composite measure of recurrence risk to tailor decision making. With longer follow-up, we now focus on distant recurrence. METHODS The TEXT/SOFT HR-positive/human epidermal growth factor receptor 2 (HER2)–negative analysis population included 4,891 women stratified by predetermined chemotherapy use. Kaplan-Meier estimates of 8-year freedom from distant recurrence were analyzed using subpopulation treatment effect pattern plot (STEPP) methodology across subpopulations defined by the continuous composite measure of recurrence risk. For each patient, the composite risk value was obtained from a Cox model that incorporated age; nodal status; tumor size; grade; and estrogen receptor, progesterone receptor, and Ki-67 labeling index expression levels. RESULTS The overall rate of 8-year freedom from distant recurrence was 91.1% and ranged from approximately 100% to 63% across lowest to highest composite risks. TEXT patients who received chemotherapy had an average absolute improvement with exemestane plus OFS versus tamoxifen plus OFS of 5.1%, and STEPP analysis showed improvements from less than 1% to more than 15% from lowest to highest composite risks. SOFT patients who remained premenopausal after chemotherapy had an average 5.2% absolute improvement with exemestane plus OFS versus tamoxifen and reached 10% across composite risks; for tamoxifen plus OFS versus tamoxifen, the maximum improvement was approximately 3.5%. Women who did not receive chemotherapy had a more than 97% rate of 8-year freedom from distant recurrence, and improvements with exemestane plus OFS ranged from 1% to 4%. CONCLUSION Premenopausal women with HR-positive/HER2-negative breast cancer and high recurrence risk, as defined by clinicopathologic characteristics, may experience a 10% to 15% absolute improvement in 8-year freedom from distant recurrence with exemestane plus OFS versus tamoxifen plus OFS or tamoxifen alone. The potential benefit of escalating endocrine therapy versus tamoxifen alone is minimal for those at low recurrence risk.
Start page
1293
End page
1303
Volume
38
Issue
12
Language
English
OCDE Knowledge area
Oncología Endocrinología, Metabolismo (incluyendo diabetes, hormonas)
Scopus EID
2-s2.0-85083545363
PubMed ID
Source
Journal of Clinical Oncology
ISSN of the container
0732183X
Sponsor(s)
Supported by Pfizer, the International Breast Cancer Study Group, the US National Cancer Institute, and the Breast Cancer Research Foundation (16-185, 17-187, and 18-003) for Tamoxifen and Exemestane Trial and Suppression of Ovarian Function Trial conduct. Pfizer and Ipsen provided the drug supply. Support for central pathology included Susan G. Komen for the Cure Promise Grant KG080081 and the Breast Cancer Research Foundation. Support for the coordinating group, International Breast Cancer Study Group, was from the US National Cancer Institute (CA075362), Frontier Science and Technology Research Foundation, Swiss Group for Clinical Cancer Research, Cancer Research Switzerland, Oncosuisse, Cancer League Switzerland, Foundation for Clinical Cancer Research of Eastern Switzerland. Support of cooperative groups was as follows: Breast Cancer Trials Australia & New Zealand (National Health and Medical Research Council grants 351161, 510788, and 1105058); Institute of Cancer Research Clinical Trials and Statistics Unit on behalf of the National Cancer Research Institute Breast Clinical Studies Group United Kingdom (Cancer Research UK grants CRUKE/03/022 and CRUKE/03/023 and grant A15955 National Institute for Health Research Royal Marsden/Institute of Cancer Research Biomedical Research Centre, National Institute for Health Research/Cambridge Biomedical Research Centre); Alliance for Clinical Trials in Oncology (US National Institutes of Health [NIH] grant CA180821); SWOG (US NIH grant CA32102); Eastern Cooperative Oncology Group-American College of Radiology Imaging Network Cancer Research Group (US NIH grants CA21115 and CA16116); NRG Oncology (US NIH grants U10CA180868, U10CA180822, and UG1CA189867); and Canadian Cancer Trials Group (US NIH grant CA077202 and Canadian Cancer Society Research Institute grants 015469 and 021039). Supported by Pfizer, the International Breast Cancer Study Group, the US National Cancer Institute, and the Breast Cancer Research Foundation (16-185, 17-187, and 18-003) for Tamoxifen and Exemestane Trial and Suppression of Ovarian Function Trial conduct. Pfizer and Ipsen provided the drug supply. Support for central pathology included Susan G. Komen for the Cure Promise Grant KG080081 and the Breast Cancer Research Foundation. Support for the coordinating group, International Breast Cancer Study Group, was from the US National Cancer Institute (CA075362), Frontier Science and Technology Research Foundation, Swiss Group for Clinical Cancer Research, Cancer Research Switzerland, Oncosuisse, Cancer League Switzerland, Foundation for Clinical Cancer Research of Eastern Switzerland. Support of cooperative groups was as follows: Breast Cancer Trials Australia & New Zealand (National Health and Medical Research Council grants 351161, 510788, and 1105058); Institute of Cancer Research Clinical Trials and Statistics Unit on behalf of the National Cancer Research Institute Breast Clinical Studies Group United Kingdom (Cancer Research UK grants CRUKE/03/022 and CRUKE/03/023 and grant A15955 National Institute for Health Research Royal Marsden/Institute of Cancer Research Biomedical Research Centre, National Institute for Health Research/Cambridge Biomedical Research Centre); Alliance for Clinical Trials in Oncology (US National Institutes of Health [NIH] grant CA180821); SWOG (US NIH grant CA32102); Eastern Cooperative Oncology Group-American College of Radiology Imaging Network Cancer Research Group (US NIH grants CA21115 and CA16116); NRG Oncology (US NIH grants U10CA180868, U10CA180822, and UG1CA189867); and Canadian Cancer Trials Group (US NIH grant CA077202 and Canadian Cancer Society Research Institute grants 015469 and 021039).
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