- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01666171
Studying Changes in Breast Density in Patients With Early-Stage Breast Cancer Treated With Metformin Hydrochloride or Placebo on CAN-NCIC-MA.32
Change in Mammographic Density With Metformin Use: A Companion Study to NCIC Study MA.32
RATIONALE: Learning about the effect of metformin hydrochloride in breast density of women with early-stage breast cancer may help plan treatment.
PURPOSE: This trial studies changes in breast density in patients with early-stage breast cancer treated with metformin hydrochloride or placebo on CAN-NCIC-MA.32.
Study Overview
Status
Conditions
Detailed Description
OBJECTIVES:
Primary
- To evaluate the change in percent mammographic density in contralateral (unaffected breast) from prior to the initiation of metformin hydrochloride (metformin) or placebo treatment through one year of therapy in patients with hormone receptor-negative breast cancer (i.e., not on endocrine therapy).
Secondary
- To evaluate the change in percent breast density in contralateral (unaffected breast) from prior to the initiation of metformin or placebo treatment through two years of therapy in patients with hormone receptor-negative breast cancer (i.e., not on endocrine therapy).
- To evaluate whether baseline mammographic density correlates with baseline of fasting plasma insulin, glucose levels, and Homeostasis Model Assessment (HOMA) (collected on the treatment protocol CAN-NCIC-MA.32) (MA.32).
- To evaluate whether changes in dense area in response to metformin therapy from pre-treatment through two years of therapy correlate with changes in fasting plasma insulin, glucose levels, and HOMA (collected on the treatment protocol MA.32) over the same time period.
- To explore whether change in mammographic density for women on metformin is associated with risk of second primary breast cancer.
OUTLINE: Patients' mammograms taken at baseline and at approximately 1 and 2 years of metformin or placebo treatment are retrieved and analyzed for breast-density change. Pre-menopausal patients' menstrual cycle information is also collected at baseline and every 6 months for 2 years.
Study Type
Enrollment (Anticipated)
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
DISEASE CHARACTERISTICS:
- Patients must either be concurrently enrolling or previously enrolled to Canada (CAN) National Cancer Institute of Canada (NCIC) study MA.32 (CAN-NCIC-MA.32) (MA.32); eligible patients may be either pre- or post-menopausal
- Patients must have hormone receptor-negative breast cancer
- Patients must have breast density ≥ 25% (correlating with the Breast Imaging-Reporting and Data [BIRAD]-2 category of "scattered fibroglandular densities" or greater)
- Baseline digital mammograms taken within 12 months prior to registration to MA.32, with at least a craniocaudal (CC) view used for enrollment to MA.32 must be available for submission; if the patient has previously enrolled to MA.32 and one year has elapsed from baseline mammograms, one-year mammograms must also be available for submission
- Contralateral unaffected breast in place (with no prior cancer or radiation, no implants, and no plan for breast surgery on contralateral breast over the course of the study); women with a prior biopsy on the unaffected breast are eligible
PATIENT CHARACTERISTICS:
- Not specified
PRIOR CONCURRENT THERAPY:
- See Disease Characteristics
- Women receiving endocrine therapy (e.g., tamoxifen, aromatase inhibitors) are not eligible
Study Plan
How is the study designed?
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
---|
Change in percent mammographic breast density in contralateral (unaffected) breast from baseline to 1 year using two-sample t-test or Wilcoxon rank-sum test
|
Secondary Outcome Measures
Outcome Measure |
---|
Change in percent mammographic breast density in contralateral (unaffected) breast from baseline to 2 years using two-sample t-test
|
Correlation between baseline mammographic density and baseline plasma fasting insulin, glucose levels, and HOMA using a scatter plot, correlation-coefficient estimation, and linear-regression method
|
Correlation of changes in dense area in response to metformin therapy from pre-treatment to on treatment (at year 1 and year 2) with plasma fasting insulin, glucose levels, and HOMA using simple linear-regression method
|
Correlation between mammographic density and the incidence of second primary breast cancer using correlation coefficient and scatter plot
|
Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Marie E. Wood, MD, University of Vermont
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Completion
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- CALGB-A211201
- CDR0000738328 (Registry Identifier: PDQ (Physician Data Query))
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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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