Clinical Outcomes After Letrozole Treatment According to the Estrogen Receptor Expression in Postmenopausal Women (LETTER)

May 10, 2011 updated by: Korean Breast Cancer Study Group

Assessment of Clinical Outcomes After Letrozole Treatment According to the Estrogen Receptor Expression in Postmenopausal Women With Hormone Receptor Positive Breast Cancer

The purpose of this study is to assess clinical outcomes after Letrozole treatment according to the estrogen receptor expression in postmenopausal women with hormone receptor positive breast cancer.

Study Overview

Status

Unknown

Conditions

Detailed Description

This study aimed at evaluating following:

  1. Validity Assessment:

    1. Primary End Point: To evaluate 5-year diseae free survival rate after Letrozole treatment according to the estrogen receptor expression in postmenopausal women
    2. Secondary End Point: To evaluate overall survival rate(OS) and Time to distance recurrence(TTDR) after Hormonal therapy in postmenopausal women with hormone receptor positive breast cancer
  2. Safety Assessment: To evaluate all adverse events including serious adverse events after Letrozole treatment.

Study Type

Observational

Enrollment (Anticipated)

876

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Sampling Method

Non-Probability Sample

Study Population

Patients recruited into the study are postmenopausal women with estrogen receptor positive breast cancer.

Description

Inclusion Criteria:

  1. Patients with estrogen receptor(+) and/or progesterone receptor(+)

  2. Postmenopausal state was defined the following conditions, at least one of a, b

    1. Serum FSH ≥ 30 mIU/mL and Amenorrhea ≥ 1 year for below 55 years, over than 55 years
    2. Bilateral oophorectomy
  3. Patients have undergone surgery of the breast cancer within 12 weeks and terminated chemotherapy after surgery within 4 weeks.
  4. WHO(ECOG) performance status 0-2
  5. Adequate haematological function, renal function, hepatic function.
  6. No evidence of metastasis.

Exclusion Criteria:

  1. Metachronous bilateral breast cancer.
  2. Metastatic breast cancer (stage IV)
  3. Other hormone therapy and Hormonal replacement therapy given within the previous 4 weeks, except for Estring, Vagifem, Estrogen Cream.
  4. Patients with Child-Pugh grade C, serum creatinine>2xUNL
  5. Patients with gastrectomy, small bowel resection, malabsorption syndrome and dysphagia.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
ER expression : Low
Patients were postmenopausal women with hormone receptor positive breast cancer. All patients should be 3 or 4 point of total Allred score.
ER expression : Intermediate
Patients were postmenopausal women with hormone receptor positive breast cancer. All patients should be 5 or 6 point of total Allred score.
ER expression : High
Patients were postmenopausal women with hormone receptor positive breast cancer. All patients should be 7 or 8 point of total Allred score.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Disease free survival
Time Frame: the first 5 years after enrollment
the first 5 years after enrollment

Secondary Outcome Measures

Outcome Measure
Time Frame
Adverse effect
Time Frame: the first 5 years after enrollment
the first 5 years after enrollment
Overall Survival
Time Frame: the first 5 years after enrollment
the first 5 years after enrollment
Time to Distant Recurrence (TTDR)
Time Frame: the first 5 years after enrollment
the first 5 years after enrollment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Korean Breast Cancer Study Group

Investigators

  • Principal Investigator: Joon Jeong, MD, Department of Surgery, Gangnam Severance Hospital, South Korea

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2010

Primary Completion (Anticipated)

January 1, 2017

Study Completion (Anticipated)

January 1, 2017

Study Registration Dates

First Submitted

February 14, 2010

First Submitted That Met QC Criteria

February 16, 2010

First Posted (Estimate)

February 17, 2010

Study Record Updates

Last Update Posted (Estimate)

May 11, 2011

Last Update Submitted That Met QC Criteria

May 10, 2011

Last Verified

May 1, 2011

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • KBCSG006

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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