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
Public ClinicalTrials.gov record NCT00553410. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
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
Study identification
- NCT ID
- NCT00553410
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 3
- Lead sponsor
- ETOP IBCSG Partners Foundation
- Network
- Enrollment
- 4,884 participants
Conditions and interventions
Conditions
Interventions
- Letrozole Drug
Drug
Eligibility (public fields only)
- Age range
- 18 Years to 120 Years
- Sex
- Female
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 31, 2007
- Primary completion
- Mar 31, 2018
- Completion
- May 14, 2019
- Last update posted
- Mar 10, 2020
2007 – 2019
United States locations
- U.S. sites
- 2
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Dana-Farber/Harvard Cancer Center at Dana-Farber Cancer Institute | Boston | Massachusetts | 02115 | — |
| Faulkner Hospital | Boston | Massachusetts | 02130-3400 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 162 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00553410, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 10, 2020 · Synced Jul 21, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00553410 live on ClinicalTrials.gov.