Visceral Fat, Metabolic Rate, and CHD Risk in Young Adults

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00005388
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: April 2004
  Purpose

To measure visceral (intraabdominal) fat by computerized tomography (CT) scan and to measure resting metabolic rate by indirect calorimetry in 400 CARDIA subjects, ages 28-40 years (100 of each race/gender group) from the Oakland, California and Birmingham, Alabama centers.


Condition
Cardiovascular Diseases
Heart Diseases
Coronary Disease
Obesity

Study Type: Observational

Resource links provided by NLM:


Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: September 1995
Estimated Study Completion Date: March 2004
Detailed Description:

BACKGROUND:

The prevalence of obesity increased markedly in the United States from the 1960's to the 1980's, and varied by race and gender with particularly high rates of obesity among Black women. Reasons for the ethnic differences in the prevalence of obesity were not understood. This cross-sectional study was performed in conjunction with the 10-year follow-up examination for the Coronary Artery Risk Development in Young Adults (CARDIA) study, an NHLBI-funded longitudinal study of development of risk factors for coronary heart disease (CHD) in young black and white adults.

This study represented a unique opportunity to investigate factors that may influence the development of obesity, to better understand the relationship between obesity and cardiovascular risk factors, and to increase understanding of racial differences in adiposity.

DESIGN NARRATIVE:

The cross-sectional study tested the hypothesis that visceral adipose tissue, the component of fat considered to be most strongly related to coronary heart disease (CHD) risk factors, differed in Black and white subjects. Specifically, the investigators proposed that Black subjects had less visceral adipose tissue for a given level of total body fat than white subjects. Further, the relationship between visceral adipose tissue and risk factors for CHD was similar in all subjects. This would explain the different relationship between obesity and CHD risk factors seen in Black vs white subjects. A second specific aim was to determine whether Black women had a lower resting energy expenditure than Black men or whites. This could explain the higher prevalence of obesity in Black women than in Black men or whites of either gender. CT scans were recorded on tape and shipped to the University of Colorado Health Sciences Center where visceral adipose tissue was quantified. Dietary intake and physical activity were measured as important covariates in the relationship between metabolic rate and adiposity, and thyroid function was measured as a determinant of resting energy expenditure. The CARDIA study provided funding for cardiovascular risk factor measurements, including blood pressure, lipids, insulin, glucose, smoking, and anthropometric measurements including dual energy absorptiometry (DEXA) measurements of total and regional body fat.

The study was renewed in 1999 through March 2004 to perform a five-year follow-up of the cohort.

  Eligibility

Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00005388

Sponsors and Collaborators
Investigators
Investigator: Stephen Sidney Kaiser Foundation
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00005388     History of Changes
Other Study ID Numbers: 4294
Study First Received: May 25, 2000
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Coronary Disease
Coronary Artery Disease
Heart Diseases
Obesity
Myocardial Ischemia
Vascular Diseases
Arteriosclerosis
Arterial Occlusive Diseases
Overnutrition
Nutrition Disorders
Overweight
Body Weight
Signs and Symptoms

ClinicalTrials.gov processed this record on July 20, 2014