Quantitative Genetic Analysis of Lipid Research Clinic Family Data

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.

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Key information

Conditions

Cardiovascular Diseases Arterial Occlusive Diseases Arteriosclerosis Atherosclerosis Congenital, Hereditary, and Neonatal Diseases and Abnormalities Coronary Disease Dyslipidemias Genetic Diseases, Inborn Heart Diseases Hypoalphalipoproteinemias Hypolipoproteinemias Lipid Metabolism Disorders Lipid Metabolism, Inborn Errors Metabolic Diseases Metabolism, Inborn Errors Myocardial Ischemia Nervous System Diseases Neuromuscular Diseases Nutritional and Metabolic Diseases Peripheral Nervous System Diseases Polyneuropathies Tangier Disease Vascular Diseases

Age range

Up to 100 year

Sex eligibility

Male

Study type

Observational

About this study

BACKGROUND:

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.

DESIGN NARRATIVE:

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

No eligibility criteria

Sponsors and collaborators

Lead sponsor

National Heart, Lung, and Blood Institute (NHLBI)

Nih

Registry information

Important dates

Study start: 1986
Study completion: 1991
First posted: May 26, 2000
Registry last updated: May 13, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed