Social Epidemiology of Trauma Among 2 American Indian Reservation Populations

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Abstract
Objectives. We examined the prevalence of trauma in 2 large American Indian communities in an attempt to describe demographic correlates and to compare findings with a representative sample of the US population. Methods. We determined differences in exposure to each of 16 types of trauma among 3084 tribal members aged 15 to 57 years through structured interviews. We compared prevalence rates of trauma, by gender, across the 2 tribes and with a sample of the US general population. We used logistic regression analyses to examine the relationships of demographic correlates to trauma exposure. Results. Lifetime exposure rates to at least 1 trauma (62.4%–67.2% among male participants, 66.2%–69.8% among female participants) fell at the upper limits of the range reported by other researchers. Unlike the US general population, female and male American Indians exhibited equivalent levels of overall trauma exposure. Members of both tribes more often witnessed traumatic events, experienced traumas to loved ones, and were victims of physical attacks than their counterparts in the overall US population. Conclusions. American Indians live in adverse environments that place them at high risk for exposure to trauma and harmful health sequelae.

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