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Home > "L" Clinical Trials Conditions > Longitudinal LDL-C Studies in Black and White Families  Longitudinal LDL-C Studies in Black and White Families
Longitudinal LDL-C Studies in Black and White Families
For Condition: Cardiovascular Diseases,Atherosclerosis
Status: No longer recruiting
Sponsor(s): National Heart, Lung, and Blood Institute (NHLBI) ,
Synopsis: To longitudinally investigate multigenerational familial clustering of plasma low density lipoprotein cholesterol (LDL-C), with particular emphasis on the influences of apoE genotypes and various 'behaviors'.
Details: BACKGROUND: Elevated concentrations of plasma low density lipoprotein cholesterol (LDL-C), a major risk factor for coronary heart disease, cluster significantly in families. This clustering has been observed in cross-sectional studies in both black and white families, but longitudinal data on the familial clustering of LDL-C are virtually nonexistent. DESIGN NARRATIVE: The longitudinal study will provide new and important information about changes in the familial low density lipoprotein cholesterol (LDL-C) correlations in black and white families from the period of shared household environments to that of separate households, using families from the Princeton Lipid Research Clinics (LRC) Prevalence (1973-75) and Family Studies (1975-76). The study will also provide important information on changes in individual LDL-C levels over the same 25 year period. The former student participants were six to 18 years of age and are now 32 to 45 years of age; their parents were (largely) 26 to 55 years of age and are now 51 to 80 years of age. Plasma LDL-C concentrations in children and adults have been shown to associate with the apolipoprotein (apo) E genotype, with obesity, and with such elective behaviors as diet, cigarette smoking, and physical activity. In the LRC Study, measurements were made of LDL-C, body habitus, elective behaviors, and the family history of cardiovascular disease (CVD). The study will obtain repeat measures of these factors, plus determine the apo E isoforms. Changes in individual LDL-C levels and in familial associations can then be assessed in association with apo E isoforms, body composition, elective behaviors, and family history of CVD. Family members share ranges of body weight, patterns of fat distribution, dietary and smoking habits, and physical activity levels. The extent to which the familial clustering of LDL-C levels is determined by apo E isoforms interacting with the similar levels of obesity, and with the similar behaviors, is not currently known.
Eligibility:
Study Type: Observational, Natural History, Longitudinal, Defined Population
Minimum Age/Maximum Age: /
Genders: Both
Protocol Entry Criteria: No eligibility criteria
Total Enrollment:
Location and Contact Information:
Additional Information:
Study ID Numbers: 957;
Study Start Date: July 2000
Record last reviewed: October 2003
Additional information available at: clinicaltrials.gov
Clinicaltrials.gov Reference link: NCT00007384
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Longitudinal LDL-C Studies in Black and White Families
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