Letrozole in Preventing Cancer in Postmenopausal Women Who Have Received 4-6 Years of Hormone Therapy for Hormone Receptor-Positive, Lymph Node-Positive, Early-Stage Breast Cancer (SOLE)
SOLE, Study of Letrozole Extension, A Phase III Trial Evaluating the Role of Continuous Letrozole Versus Intermittent Letrozole Following 4 to 6 Years of Prior Adjuvant Endocrine Therapy for Postmenopausal Women With Hormone-Receptor Positive, Node Positive Early Stage Breast Cancer
Sponsor: Breast International Group
This PHASE3 trial investigates Breast Cancer and is currently completed. Breast International Group leads this study, which shows 13 recorded versions since 2007 — indicating substantial longitudinal coverage. As an oncology study, it adds to the longitudinal record of treatment development for this indication.
Status Flow
Change History
13 versions recorded-
Sep 2025 — Present [monthly]
Completed PHASE3
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Sep 2024 — Sep 2025 [monthly]
Completed PHASE3
-
Jul 2024 — Sep 2024 [monthly]
Completed PHASE3
-
Jan 2023 — Jul 2024 [monthly]
Completed PHASE3
-
Dec 2022 — Jan 2023 [monthly]
Completed PHASE3
▶ Show 8 earlier versions
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Oct 2022 — Dec 2022 [monthly]
Completed PHASE3
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Jan 2021 — Oct 2022 [monthly]
Completed PHASE3
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Apr 2020 — Jan 2021 [monthly]
Completed PHASE3
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Jul 2019 — Apr 2020 [monthly]
Completed PHASE3
Status: Active Not Recruiting → Completed
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Feb 2019 — Jul 2019 [monthly]
Active Not Recruiting PHASE3
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Jun 2018 — Feb 2019 [monthly]
Active Not Recruiting PHASE3
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Mar 2018 — Jun 2018 [monthly]
Active Not Recruiting PHASE3
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Jan 2017 — Mar 2018 [monthly]
Active Not Recruiting PHASE3
First recorded
Aug 2007
Trial started
Per CT.gov start date — pre-dates our first snapshot
Eligibility Summary
No eligibility information available.
Contact Information
- Breast International Group
- ETOP IBCSG Partners Foundation
For direct contact, visit the study record on ClinicalTrials.gov .
Study Locations
Aalen, Germany , Aarau, Switzerland , Aarhus C, Denmark , Antwerp, Belgium , Arlon, Belgium , Armidale, Australia , Aviano, Italy , Baden, Switzerland , Bankstown, Australia , Barcelona, Spain and 131 more locations