The National Vietnam Veterans Readjustment Study (NVVRS) was conducted by the U.S. government to better understand the psychological effect of being in the Vietnam War. The findings from this study were alarming. At the time of the study (middle to late 1980s), among Vietnam veterans, approximately 15% of men and 9% of women were found to currently have PTSD. Approximately 30% of men and 27% of women had PTSD at some point in their life following Vietnam.
These findings, obtained approximately a decade after the end of the Vietnam War, found that for many veterans, their PTSD had become a chronic (that is, persistent and long-lasting) condition. In fact, fourteen years after this study, many of these veterans were interviewed again, and it was found that a substantial proportion continued to have PTSD, as well as a number of other difficulties, such as physical health problems, marital problems, and psychological difficulties. Read more about the long-term impact of chronic PTSD among Vietnam veterans here.