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Quantitative Genetic Analysis of Lipid Research Clinic Family Data

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00005188
Recruitment Status : Completed
First Posted : May 26, 2000
Last Update Posted : May 13, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Brief Summary:
To assess the mode of inheritance of familial combined hyperlipidemia and familial primary hypoalphalipoproteinemia and to resolve genetic and familial environmental effects on several phenotypes of importance to coronary heart disease.

Condition or disease
Cardiovascular Diseases Heart Diseases Coronary Disease Tangier Disease Atherosclerosis

Detailed Description:


Although coronary heart disease has long been known to aggregate in families, in 1986 little was known about the relative importance of genetic and environmental factors. This was partly due to the heterogeneous nature of the disease. Instead of analyzing complex endpoints, the tendency had been to focus on the individual risk factors or phenotypes. Plasma lipids and lipoproteins are heterogeneous risk factors that have been analyzed as subgroups from a genetic epidemiological perspective. Attention turned to the familial aggregation of risk factors, particularly the hyperlipidemias, hypertension, and diabetes.

In 1971, the National Heart and Lung Institute began a series of epidemiologic studies at several North American sites under the Lipid Research Clinics Program. The Family Study was designed to investigate the familial association of blood lipids, lipoproteins, and dyslipoproteinemias. This study complemented and did not duplicate ongoing analysis of Lipid Research Clinics data.


The study addressed seven phenotypes, all derived from fasting blood samples: total cholesterol, total triglyceride, LDL-cholesterol, HDL-cholesterol, VLDL-cholesterol, uric acid, and glucose levels. The data had already been collected at Lipid Research Clinics in Cincinnati, Iowa, Oklahoma, Minneapolis, and Stanford. Univariate and bivariate segregation analysis were conducted on the mode of inheritance of familial combined hyperlipidemia and familial primary hypoalphalipoproteinemia. Path analysis was used to resolve cultural and biological inheritance for each phenotype within each clinic and for resolution of population heterogeneity among the five Lipid Research Clinics. A general bivariate path model was used to analyze the associations among the various phenotypes. General models were used to analyze temporal trends in family resemblance for the seven phenotypes.

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

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Study Type : Observational
Study Start Date : July 1986
Actual Study Completion Date : June 1991

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Ages Eligible for Study:   up to 100 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
No eligibility criteria

Layout table for additonal information Identifier: NCT00005188    
Other Study ID Numbers: 1066
R01HL033973 ( U.S. NIH Grant/Contract )
First Posted: May 26, 2000    Key Record Dates
Last Update Posted: May 13, 2016
Last Verified: August 2004
Additional relevant MeSH terms:
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Tangier Disease
Cardiovascular Diseases
Heart Diseases
Coronary Disease
Arterial Occlusive Diseases
Vascular Diseases
Myocardial Ischemia
Peripheral Nervous System Diseases
Neuromuscular Diseases
Nervous System Diseases
Lipid Metabolism, Inborn Errors
Metabolism, Inborn Errors
Genetic Diseases, Inborn
Lipid Metabolism Disorders
Metabolic Diseases