- ICH GCP
- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico 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.
Descripción general del estudio
Estado
Condiciones
Descripción detallada
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.
Tipo de estudio
Inscripción (Anticipado)
Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
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
Plan de estudios
¿Cómo está diseñado el estudio?
¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
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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
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Medidas de resultado secundarias
Medida de resultado |
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Change in percent mammographic breast density in contralateral (unaffected) breast from baseline to 2 years using two-sample t-test
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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
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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
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Correlation between mammographic density and the incidence of second primary breast cancer using correlation coefficient and scatter plot
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Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Marie E. Wood, MD, University of Vermont
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Finalización primaria (Anticipado)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Estimar)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- CALGB-A211201
- CDR0000738328 (Identificador de registro: PDQ (Physician Data Query))
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
producto fabricado y exportado desde los EE. UU.
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