Precursors of CVD Risk Factors--Project Heartbeat
Primary Purpose
Cardiovascular Diseases, Heart Diseases, Hypercholesterolemia
Status
Completed
Phase
Locations
Study Type
Observational
Intervention
Sponsored by
About this trial
This is an observational trial for Cardiovascular Diseases
Eligibility Criteria
No eligibility criteria
Sites / Locations
Outcomes
Primary Outcome Measures
Secondary Outcome Measures
Full Information
NCT ID
NCT00005478
First Posted
May 25, 2000
Last Updated
May 12, 2016
Sponsor
National Heart, Lung, and Blood Institute (NHLBI)
1. Study Identification
Unique Protocol Identification Number
NCT00005478
Brief Title
Precursors of CVD Risk Factors--Project Heartbeat
Study Type
Observational
2. Study Status
Record Verification Date
March 2004
Overall Recruitment Status
Completed
Study Start Date
September 1996 (undefined)
Primary Completion Date
undefined (undefined)
Study Completion Date
September 1998 (Actual)
3. Sponsor/Collaborators
Name of the Sponsor
National Heart, Lung, and Blood Institute (NHLBI)
4. Oversight
5. Study Description
Brief Summary
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.
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.
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Cardiovascular Diseases, Heart Diseases, Hypercholesterolemia, Hypertension
7. Study Design
10. Eligibility
Sex
All
Minimum Age & Unit of Time
8 Years
Maximum Age & Unit of Time
14 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
No eligibility criteria
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Darwin Labarthe
Organizational Affiliation
University of Texas
12. IPD Sharing Statement
Learn more about this trial
Precursors of CVD Risk Factors--Project Heartbeat
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