The Framingham Study: Examining DNA Markers and Links to Diseases

NCT ID: NCT00062777

Last Updated: 2017-07-02

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 330 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2003-06-12
• Study Completion Date: 2011-06-16

Brief Summary

Since 1948, residents of Framingham, Massachusetts, have participated in a program that collects blood samples and clinical data to provide a rare and valuable database for scientific research.

The purpose of this study is to support this national resource by aiding in its research capacity. Specifically, researchers in this study will (1) investigate heart, lung, and blood diseases; stroke; memory loss; joint disease; bone loss; deafness; cancer; blood vessel diseases and other health conditions, and (2) examine DNA and its relationship to risk of developing these disease and health conditions.

Approximately 330 families have participated in the Framingham Study. Participants will be required to undergo a four-hour exam and to take that exam every two years thereafter. During the exam, the Framingham investigators will (1) interview participants about medical status, health issues, and lifestyles; (2) perform a regular physical exam; (3) obtain blood and urine samples and administer a glucose-tolerance test; (4) supervise a brisk six-minute treadmill walk; (5) administer an ultrasound procedure; and (6) review and obtain copies of medical and hospital records. Participants will also be asked to complete a questionnaire at home regarding dietary and health habits.

Detailed Description

Many studies have shown that hematocrit (HCT) levels are associated with cerebrovascular disease, cardiovascular disease (CVD), peripheral vascular disease, as well as all-cause mortality. Twin studies have shown that HCT variation is largely determined by genetic factors with heritability estimated as 40% - 65%. So far, no linkage analysis in humans between HCT and DNA markers have been reported. The purpose of this protocol is to identify chromosome regions that contain quantitative trait loci (QTL) involved in controlling HCT levels. In the Framingham Study, a 10cM genome scan (about 400 markers) has been conducted in 330 families. HCT was measured in the original cohort and Framingham offspring. These data provide us the opportunity to undertake linkage analyses using variance component method to map quantitative trait loci (QTL) of HCT.

Conditions

Vascular Diseases

Eligibility Criteria

Exclusion Criteria

The study population will include the members of the 330 Framingham Study families with genome scan.

• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

National Heart, Lung, and Blood Institute (NHLBI)

NIH

Sponsor Role: lead

Locations

National Institutes of Health Clinical Center, 9000 Rockville Pike

Bethesda, Maryland, United States

Countries

United States

Other Identifiers

03-H-0219

Identifier Type: -

Identifier Source: secondary_id

030219

Identifier Type: -

Identifier Source: org_study_id