TEXT randomized patients to receive exemestane or tamoxifen with OFS. SOFT randomized patients to receive exemestane with OFS, tamoxifen with OFS, or tamoxifen alone. Treatment was for 5 years from randomization.
TEXT and SOFT successfully met their enrollment goals in 2011. The 5738 enrolled women had lower-risk disease and lower observed disease-free survival (DFS) event rates than anticipated. Consequently, 7 and 13 additional years of follow-up for TEXT and SOFT, respectively, were required to reach the targeted DFS events (median follow-up about 10.5 and 15 years). To provide timely answers, protocol amendments in 2011 specified analyses based on chronological time and median follow-up. To assess the AI question, exemestane聽+聽OFS versus tamoxifen聽+聽OFS, a combined analysis of TEXT and SOFT became the primary analysis (n聽=聽4717). The OFS question became the primary analysis from SOFT, assessing the unique comparison of tamoxifen聽+聽OFS versus tamoxifen alone (n聽=聽2045). The first reports are anticipated in mid- and late-2014.
We present the original designs of TEXT and SOFT and adaptations to ensure timely answers to two questions concerning optimal adjuvant endocrine treatment for premenopausal women with endocrine-responsive breast cancer.
Trial Registration
TEXT:
SOFT: