Precursors of CVD Risk Factors--Project Heartbeat

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00005478
First received: May 25, 2000
Last updated: May 12, 2016
Last verified: March 2004
  Purpose
To elucidate the changes in body size, composition, and configuration occurring in adolescence, because these are important precursors of change in blood pressure and blood lipids.

Condition
Cardiovascular Diseases
Heart Diseases
Hypercholesterolemia
Hypertension

Study Type: Observational

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

Study Start Date: September 1996
Study Completion Date: September 1998
Detailed Description:

BACKGROUND:

Project HeartBeat! was uniquely designed to investigate the course of change in cardiovascular disease risk factors and several categories of covariates, including the anthropometric indicators addressed in this study. The data pertained to the 678 participants who entered the Project in 1991-93 at ages 8, 11 or 14 years of age, of whom 49.1 percent were female and 20.1 percent were black. Of the 395 participants who became eligible for 10 or more 4-monthly examinations, 349 (88.4 percent) completed at least 10 occasions; 538 participants of 556 who were eligible for seven or more examinations (96.8 percent) completed at least seven. Multi-level (MLn) analytic methods previously tested with other data were utilized for this analysis.

DESIGN NARRATIVE:

Data from Project Heartbeat were analyzed. Hypotheses tested included: (1) the time patterns of change in several indicators of body size, composition and configuration over the period of observation; (2) the relations between the time patterns of change in these indicators and the corresponding patterns for change in selected endocrine factors; and (3) the explanatory contributions of energy intake and expenditure to variation between individuals in their observed time patterns of change in these indicators. The anthropometric indicators addressed were: weight (total mass), height, body mass index (BMI, wt/ht2), fat-free mass, fat mass, per cent body fat, and fat distribution (waist/hip ratio). Each of these indicators were examined first separately and then in relation to selected endocrinologic measures (testosterone, estradiol, and DHEAS) and to energy intake and expenditure (from interview histories of diet and physical activity). Existing data from up to twelve 4-monthly examinations over the age range from 8-17 years conducted in Project HeartBeat! were analyzed.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

  Eligibility

Ages Eligible for Study:   8 Years to 14 Years   (Child)
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria
No eligibility criteria
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00005478

Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
Investigators
OverallOfficial: Darwin Labarthe University of Texas
  More Information

ClinicalTrials.gov Identifier: NCT00005478     History of Changes
Other Study ID Numbers: 4962  R03HL057101 
Study First Received: May 25, 2000
Last Updated: May 12, 2016
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Heart Diseases
Hypercholesterolemia
Hyperlipidemias
Dyslipidemias
Lipid Metabolism Disorders
Metabolic Diseases

ClinicalTrials.gov processed this record on August 25, 2016