Institute of Medicine

Board on Military and Veterans Health

Committee on Making Best Use of the Agent Orange Exposure Reconstruction Model

A fundamental challenge in past studies evaluating whether health problems experienced by Vietnam veterans might be linked to wartime use of Agent Orange or other herbicides has been a lack of information about the veterans' level of exposure to these herbicides. To address that problem, researchers developed a model to assess the opportunity for herbicide exposure among these veterans. The Utility of Proximity-Based Herbicide Exposure Assessment in Epidemiologic Studies of Vietnam Veterans presents the conclusions and recommendations of an Institute of Medicine committee (IOM) that was convened to provide guidance to the Department of Veterans Affairs (VA) about the best use of a model to characterize exposure to the troops based on their proximity to herbicide spraying in Vietnam. This book's assessment is guided by four primary considerations: to be clear about what the assessment model does and does not claim to do; to gain understanding of the strengths and limitations of data on herbicide spraying, troop locations, and health outcomes; to consider whether the model locates spraying and troops accurately to consider the potential contributions and pitfalls of using it in epidemiologic studies. Of particular interest in these deliberations were the degree to which exposure classification might be improved if the model were to be used, and the appropriate interpretation of the results of any such studies. In light of the questions that remain concerning herbicide exposure and health among Vietnam veterans and the array of evidence that has thus far been brought to bear on that issue, The Utility of Proximity-Based Herbicide Exposure Assessment in Epidemiologic Studies of Vietnam Veterans concludes that the application of this model offers a constructive approach to extending knowledge about the effects of herbicides on the health of these veterans and merits the initial steps recommended in our report.

The Utility of Proximity-Based Herbicide Exposure Assessment in Epidemiologic Studies of Vietnam Veterans

Medical Follow-Up Agency

Advisory Panel for the Study of Long-Term Health Effects of Participation in Project SHAD

Harriet M. Crawford

Heather A. Young

William F. Page

More than 5,800 military personnel, mostly Navy personnel and Marines, participated in a series of tests of U.S. warship vulnerability to biological and chemical warfare agents, Project SHAD (Shipboard Hazard and Defense), in the period 1962-1973. Only some of the involved military personnel were aware of these tests at the time. Many of these tests used simulants, substances with the physical properties of a chemical or biological warfare agent, thought at the time to have been harmless. The existence of these tests did not come to light until many decades later. In September 2002, the Institute of Medicine (IOM) agreed to undertake a scientific study, funded by the Veterans' Affairs, of potential long-term health effects of participation in Project SHAD. In general, there was no difference in all-cause mortality between Project SHAD participants and nonparticipant controls, although participants statistically had a significantly higher risk of death due to heart disease, had higher levels of neurodegenerative medical conditions and higher rates of symptoms with no medical basis. Long-Term Health Effects of Participation in Project SHAD focuses on the potential health effects of participation in Project SHAD. It is a useful resource for government defense agencies, scientists and health professionals.

Long-Term Health Effects of Participation in Project SHAD (Shipboard Hazard and Defense)

Board on Military and Veterans Health

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