Cardiovascular Risk Factors in United States Adolescents and Adults

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: NCT00005171
Recruitment Status : Completed
First Posted : May 26, 2000
Last Update Posted : February 18, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Brief Summary:
To describe secular trends in cardiovascular risk factors in the adolescent and adult United States population and to identify and quantify the changes in variables related to these risk factors. Also, to modify and implement the statistical methodology available for the analysis of complex sample survey data in order to model and test these secular trends across separate nationally representative databases. The differences in risk factors in these samples were contrasted with those from a special population group, Hispanic Americans.

Condition or disease
Cardiovascular Diseases Heart Diseases

Detailed Description:


In 1985 when the study was initiated, there were surprisingly little data on the distribution of risk factors among subgroups of the population and the changes occurring over time. These issues assumed greater importance as the decline in coronary heart disease mortality focused interest on the role of primary prevention through alteration of risk factors. In review of the potential contributions to this decline, it was noted that cessation of cigarette smoking, better blood pressure control and decrease in total serum cholesterol may have accounted partially for the decline in coronary heart disease mortality. However, these observations overlooked the possibility that observations in the total population or confined to specific socioeconomic groups may fail to disclose differential changes in particular population segments. For example, Americans in the higher educational and income groups experienced rapid and marked changes in risk behaviors while less educated, lower income Americans or specific racial/ethnic groups experienced no beneficial changes. The majority of cohort studies followed rather select groups and most cross-sectional surveys also had little sociodemographic variability. However, focusing public health, educational and medical intervention efforts required that particular groups at greater risk or experiencing less beneficial secular change be identified and targeted for greater efforts.


Trends in blood pressure, serum lipids, and cigarette smoking were described in nationally representative samples of adolescents ages 12 to 17 and in young adults ages 18 to 24 using data from surveys conducted from 1960 to 1984 by the National Center for Health Statistics (NCHS). Trends in blood pressure, serum lipids, cigarette smoking, and obesity were described in nationally representative samples of older adults ages 35 to 75 using NCHS survey data. The national surveys used included National Health Examination Surveys (NHES-I and III), the National Health and Nutrition Examination Surveys (NHANES I and II) and Hispanic NHANES. The secular trends in these risk factors were contrasted by subgroupings of age, race, sex, family income, and education. The correlates of these risk factors were determined and secular changes over time were identified and quantified. Risk factor values and their correlates in the national population sample were contrasted with the three Hispanic populations surveyed in the Hispanic Health and Nutrition Examination Survey (HHANES). Statistical methodologies were refined including statistical software for the analysis of complete sample survey data, model fitting strategies to characterize the secular trends across four national surveys, and guidelines for the choice of analytical strategies.

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

Study Type : Observational
Study Start Date : December 1984
Actual Study Completion Date : March 1993

Information from the National Library of Medicine

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

Publications: Identifier: NCT00005171     History of Changes
Other Study ID Numbers: 1046
R01HL033407 ( U.S. NIH Grant/Contract )
First Posted: May 26, 2000    Key Record Dates
Last Update Posted: February 18, 2016
Last Verified: June 2000

Additional relevant MeSH terms:
Cardiovascular Diseases
Heart Diseases