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

May 25, 2000
June 23, 2005
September 1995
Not Provided
Not Provided
Not Provided
Complete list of historical versions of study NCT00005388 on ClinicalTrials.gov Archive Site
Not Provided
Not Provided
Not Provided
Not Provided
 
Visceral Fat, Metabolic Rate, and CHD Risk in Young Adults
Not Provided

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.

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.

Observational
Not Provided
Not Provided
Not Provided
Not Provided
Not Provided
  • Cardiovascular Diseases
  • Heart Diseases
  • Coronary Disease
  • Obesity
Not Provided
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
Not Provided
March 2004
Not Provided
Not Provided
Male
Not Provided
No
Contact information is only displayed when the study is recruiting subjects
Not Provided
 
NCT00005388
4294
Not Provided
Not Provided
National Heart, Lung, and Blood Institute (NHLBI)
Not Provided
Investigator: Stephen Sidney Kaiser Foundation
National Heart, Lung, and Blood Institute (NHLBI)
April 2004

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP