The Sister Study: Genetic and Environmental Risk Factors for Breast Cancer
Public ClinicalTrials.gov record NCT00047970. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The Sister Study is prospectively examining environmental and familial risk factors for breast cancer and other diseases in a cohort of 50,884 sisters of women who have had breast cancer. Such sisters have about twice the risk of developing breast cancer as other women.
Study identification
- NCT ID
- NCT00047970
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 50,884 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 35 Years to 74 Years
- Sex
- Female
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 31, 2003
- Primary completion
- Jul 31, 2009
- Completion
- Mar 31, 2015
- Last update posted
- Apr 14, 2015
2003 – 2015
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| NIEHS | Research Triangle Park | North Carolina | 27514 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00047970, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Apr 14, 2015 · Synced Sep 18, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00047970 live on ClinicalTrials.gov.