PROJECT SUMMARY
American Indians (AIs) have a lower life expectancy by 5.5 years less compared to all
other U.S. races. Cardiovascular disease prevalence has been increasing among AIs and serves
as the leading cause of mortality among AIs. Trauma confers risk for poor cardiovascular health.
AIs have disproportionately higher incidence of childhood trauma compared to other racial and
ethnic groups. Additionally, AIs deal with the ongoing implications from historical trauma,
which is the emotional and psychological wounding associated with the loss of land, language,
and cultural traditions. It remains possible that both childhood and historical traumas may
contribute to persisting AI health disparities. The relationship between trauma and health in
other racial and ethnic groups has been studied for many years, and research indicates
differences in physiological responses to acute stress may contribute to the negative effects of
trauma on health. To date, the relationship between trauma and markers of risk for
cardiometabolic disease and poor mental health, and the role of physiological responses to
stress in this relationship, have not been studied in an exclusively AI community.
To address this critical research gap, the present study will elucidate relationships
between trauma and health in the Blackfeet community in Montana. The life expectancy for
members of the Blackfeet is 13 years less than the life expectancy of non-Hispanic Whites living
in the same county, in part due to the disproportionality high incidence of cardiometabolic
disease and mental health conditions in the community which suffers from both high rates of
trauma.
A sample of AI adults (N=400, 50% female, age range: 18-25 years) residing on the same
reservation will participate in a cross-sectional study. Participants will report childhood and
historical trauma, alcohol use, and depressive and anxiety symptomology and will complete two
in-person visits. During Visit 1, participants will have their resting blood pressure assessed,
waist circumference measured, and blood samples taken for biomarkers of cardiometabolic risk.
During Visit 2, participants will have arterial stiffness measured and complete a validated acute
psychological laboratory paradigm. Participants will have cardiovascular, neuroendocrine, and
inflammatory responses to the acute stress measured. The findings will ultimately inform future
intervention efforts and provide the basis for longitudinal work to capture trajectories of
cardiometabolic and mental health in the context of past and ongoing trauma.