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The Vietnam Era Twin (VET) Registry: Ascertainment Bias

  • J. Goldberg (a1) (a2), W. True (a3), S. Eisen (a4), W. Henderson (a2) and C.D. Robinette (a5)...
Abstract

An examination of ascertainment bias in identification of twin pairs in the Vietnam Era Twin Registry has been conducted. A complete listing of all male-male Vietnam era veteran twin pairs born in Connecticut between 1939 and 1955 was obtained (N = 150). An attempt was made to match these pairs with a listing of Vietnam era veteran twin pairs derived from the United States Department of Defense's Defense Manpower Data Center (DMDC) computer files. The results indicate that the DMDC files identified only 46.7% of the 150 Connecticut born Vietnam era veteran pairs. Statistically significant differences (P < 0.05) between pairs found on the DMDC files and Connecticut veteran pairs missing from the DMDC files are observed for the following variables: a) year of discharge from military service, b) total length of active military service, c) branch of service, and d) foreign service. No consistent pattern of bias is observed for factors related to the physical and psychosocial healt of veteran pairs. The implications of the ascertainment biases in the Vietnam Era Twin Registry are discussed.

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Copyright
Corresponding author
Vietnam Era Twin Study, Hines VA CSPCC (151k), Hines, IL 60141, USA
References
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1.American Psychiatric Association (1980): Diagnostic and Statistical Manual of Mental Disorders III (DSM III). Washington, DC.
2.Boulanger, G, Kadushin, C (1986): The Vietnam Veteran Redefined: Fact and Fiction. Hillsdale, NJ: Lawrence Erlbaum Associates.
3.Card, J (1983): Lives after Vietnam. Lexington, MA: D.C. Heath.
4.Connecticut Division of Health Statistics (1980): Multiple Birth Tape Layout. Unpublished document.
5.Egendorf, A, Kadushin, C, Laufer, RS, Rothbart, G, Sloan, L (1981): Legacies of Vietnam, Vol. 1: Summary of Findings. Washington, DC: US Government Printing Office.
6.Eisen, S, True, W, Goldberg, J, Henderson, W, Robinette, CD (1987): The Vietnam era twin (VET) Registry: method of construction. Acta Genet Med Gemellol 36:6166.
7.Harris, L (1980): Myths and realities: A study of attitudes toward Vietnam era veterans. Washington, DC: Veterans Administration, Senate Committee.
8.Sonnenberg, SM, JrBlank, AS, Talbott, JA (1985): The Trauma of War: Stress and Recovery in Viet Nam Veterans. Washington, DC: American Psychiatric Press, Inc.
9.United States Department of Defense (1982): Defense Manpower Data Center: Data Base Profile and Overwiew. Unpublished document.
10.Unites States, National Archives and Records Service, National Personnel Records Center (1974): Directory of Military Personnel and Related Records. Unpublished document.
11.United States, National Archives and Records Service, National Personnel Records Center (1981): Administrative History of the National Personnel Records Center. Unpublished document.
12.Veterans Administration, Reports and Statistics Service, Office of the Controller (1980): 1979 National Survey of Veterans II, Summary Report.
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Acta geneticae medicae et gemellologiae: twin research
  • ISSN: 0001-5660
  • EISSN: 2059-6324
  • URL: /core/journals/amg-acta-geneticae-medicae-et-gemellologiae-twin-research
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