# Studying Changes in Breast Density in Patients With Early-Stage Breast Cancer Treated With Metformin Hydrochloride or Placebo on CAN-NCIC-MA.32

> **NCT01666171** · — · UNKNOWN · sponsor: **Cancer and Leukemia Group B** · enrollment: 458 (estimated)

## Conditions studied

- Breast Cancer

## Interventions

- **DRUG:** metformin hydrochloride
- **OTHER:** clinical observation
- **OTHER:** diagnostic laboratory biomarker analysis
- **OTHER:** imaging biomarker analysis
- **OTHER:** medical chart review
- **PROCEDURE:** digital mammography

## Key facts

- **NCT ID:** NCT01666171
- **Lead sponsor:** Cancer and Leukemia Group B
- **Sponsor class:** NETWORK
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2012-08
- **Primary completion:** 2013-04
- **Final completion:** —
- **Target enrollment:** 458 (ESTIMATED)
- **Last updated:** 2013-07-10

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01666171

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01666171, "Studying Changes in Breast Density in Patients With Early-Stage Breast Cancer Treated With Metformin Hydrochloride or Placebo on CAN-NCIC-MA.32". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT01666171. Licensed CC0.

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