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Spots Global Cancer Trial Database for Long-term Anastrozole Versus Tamoxifen Treatment Effects

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Trial Identification

Brief Title: Long-term Anastrozole Versus Tamoxifen Treatment Effects

Official Title: Long-term Anastrozole Versus Tamoxifen Treatment Effects (LATTE)

Study ID: NCT01745289

Conditions

Breast Cancer

Interventions

Study Description

Brief Summary: Established in 2010, the Long-term Anastrozole vs Tamoxifen Treatment Effects (LATTE) observational study aims to collect vital long-term safety and efficacy data on anastrozole and tamoxifen, drugs that were taken by post-menopausal women as part of the Anastrozole Tamoxifen Alone or in Combination (ATAC) trial. ATAC was a crucial breast cancer trial evaluating the use of aromatase inhibitors (AIs) in the adjuvant setting, with a median follow-up of over 10 years. The ATAC trial assessed the safety and efficacy of anastrozole+placebo, tamoxifen+placebo and anastrozole+tamoxifen in postmenopausal women undergoing treatment for invasive primary breast cancer

Detailed Description: The LATTE study aims to collect further follow-up information on a maximum of 2200 UK eligible patients, who were randomised to the monotherapy arms (anastrozole or tamoxifen) in the ATAC trial. The LATTE study also aims to collect follow-up information on as many eligible patients as possible in international sites in the EU, US and Australia/New Zealand who were randomised to the monotherapy arms (anastrozole or tamoxifen) in the ATAC trial. The study's primary objective is to provide additional efficacy and safety data on time to recurrence of breast cancer and death after recurrence. The secondary objectives include time to distant recurrence, cancer-specific survival, new breast primaries, other cancers, ischaemic cardiac and cerebrovascular events and hip (and other) fractures. Participants will be followed-up annually until at least 15 years median follow-up. In 2010, results from 10-year follow-up from ATAC demonstrated that there is long-term superiority of anastrozole over tamoxifen as initial adjuvant therapy for post-menopausal women with hormone-sensitive early breast cancer. This paper demonstrated that there were significantly lower rates of local and distant recurrence, as well as reduced contralateral breast cancer in patients treated with anastrozole. However, in 2016 a recent preliminary analysis of the LATTE study demonstrated that the benefits of anastrozole do not continue long-term after 10 years in terms of reduced recurrence rates. The results also suggested that there was a larger reduction of new contralateral tumours with tamoxifen. However, the preliminary analysis was limited in that there was limited data with possible under reporting of vital events inked to the safety and efficacy endpoints; this therefore may diminish the effect of anastrozole. Queen Mary University of London (QMUL) therefore require extended cohort events, obtainable from HES, cancer registration and mortality data in order to conclude the long-term safety of either intervention. QMUL will then be able to integrate the pseudonymised LATTE data with the ATAC data sets in order to perform an analysis of the overall 20-year follow-up period.

Eligibility

Minimum Age: 18 Years

Eligible Ages: ADULT, OLDER_ADULT

Sex: FEMALE

Healthy Volunteers: No

Locations

Queen Mary University of London, London, England, United Kingdom

Contact Details

Name: Robert Smith, PhD

Affiliation: American Cancer Society, Inc.

Role: PRINCIPAL_INVESTIGATOR

Name: Aman Buzdar, MD

Affiliation: M.D. Anderson Cancer Center

Role: PRINCIPAL_INVESTIGATOR

Useful links and downloads for this trial

Clinicaltrials.gov

Google Search Results

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