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LATTE: Long-term Anastrozole versus Tamoxifen Treatment Effects

Long-term Anastrozole versus Tamoxifen Treatment Effects in breast cancer: an epidemiologial observational study

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ISRCTN
Registry ID
ISRCTN86305500
Enrollment
4437
Registered
2009-03-30
Start date
2010-03-11
Completion date
Unknown
Last updated
2025-05-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breast cancer Cancer Malignant neoplasm of the breast

Interventions

Current interventions as of 09/04/2024: There are no trial drugs or treatments associated with this observational study. Long-term follow-up data will be collected for this Research Database for the f
not angina or transient ischaemic attack), all hip fractures, and fractures leading to an overnight stay in hospital. Note: From 2019 onwards, follow-up data will continue to be collected solely via

Sponsors

Queen Mary University of London (UK)
Lead Sponsor

Eligibility

Sex/Gender
Female

Inclusion criteria

Inclusion criteria: 1. Patients randomised to one of the monotherapy arms in the ATAC trial (randomised to the ATAC trial during the period 1996 - 2003 and were female, post-menopausal and 45 years and above at the time of randomisation) 2. Alive at 10 years follow-up

Exclusion criteria

Exclusion criteria: 1. Patients who have withdrawn consent to participate in the ATAC trial or this study 2. Where the LATTE Executive Committee determines that there is no possibility of obtaining follow-up

Design outcomes

Secondary

MeasureTime frame
To compare the long-term effects of tamoxifen (20 mg once daily [od]) and anastrozole (1 mg od) which were given in the ATAC trial (and who have all now completed treatment) as adjuvant therapy in terms of: 1. Time to distant recurrence 2. Cancer-specific survival 3. New breast primaries 4. Other cancers 5. Ischaemic cardiac and cerebrovascular events 6. Hip (and other) fractures

Primary

MeasureTime frame
Time to recurrence of breast cancer in the post 10 year period (defined as the earliest of local or distant recurrence, new primary breast cancer, or death).

Countries

Australia, Belgium, Canada, England, France, Germany, Italy, Netherlands, New Zealand, South Africa, Sweden, United Kingdom, United States of America

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026