Vietnam Era Twin (VET) Registry

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: NCT00005126
Recruitment Status : Completed
First Posted : May 26, 2000
Last Update Posted : July 12, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Brief Summary:
To conduct a baseline survey on cardiovascular, respiratory, and other major systemic disease and risk factors in members of the Vietnam Era Twin Registry.

Condition or disease
Cardiovascular Diseases Blood Disease Heart Diseases Lung Diseases

Detailed Description:


The Vietnam Veteran Twin Registry, maintained by the NAS-NRC, was created with funding from the Veterans Administration. Department of Defense records were searched for subjects born between 1939-1957 and having the same last name and date of birth. Follow-up of induction records determined if the subjects were twins.

The registry supplemented the older World War II Veterans Twin Registry supported by the National Heart, Lung, and Blood Institute. The new registry provided an opportunity to create a resource with Black and Hispanic twins as well as whites. The new registry also included data on greater educational, socioeconomic, and lifestyle diversity than was available in the World War II Veterans Twin Registry.


During the first year a mailed questionnaire was designed which provided baseline data on family history, body size, morbidity, psychosocial characteristics, smoking, alcohol consumption, diet, physical activity, and drug use. The baseline data were used for analysis of cardiovascular, pulmonary, and blood diseases, and for follow-up. From the original survey, the Veterans Administration provided magnetic tape data on zygosity, smoking, alcohol consumption, heart, lung, and blood diseases, discharge rank, education, occupation, and family income. The questionnaire was completed by almost 8,900 individuals including over 3,000 twin pairs.

The study completion date listed in this record was obtained from the "Completed Date" entered in the Query View Report System (QVR).

Study Type : Observational
Study Start Date : April 1989
Actual Study Completion Date : March 1991

Information from the National Library of Medicine

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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

Publications: Identifier: NCT00005126     History of Changes
Other Study ID Numbers: 905
First Posted: May 26, 2000    Key Record Dates
Last Update Posted: July 12, 2016
Last Verified: May 2000

Additional relevant MeSH terms:
Cardiovascular Diseases
Heart Diseases
Lung Diseases
Hematologic Diseases
Respiratory Tract Diseases