Associations of childhood adversity and adulthood trauma with C-reactive protein: A cross-sectional population-based study

• High prevalence of trauma exposure in population-based sample.
• Independent association of childhood adversity and elevated inflammation in old age.
• Independent association of adulthood trauma and elevated inflammation in old age.
• No interaction of childhood adversity and adulthood trauma with inflammation.
• Inflammation may mediate relationship between trauma exposure and ill health.

Mounting evidence highlights specific forms of psychological stress as risk factors for ill health. Particularly strong evidence indicates that childhood adversity and adulthood trauma exposure increase risk for physical and psychiatric disorders, and there is emerging evidence that inflammation may play a key role in these relationships. In a population-based sample from the Health and Retirement Study (n = 11,198, mean age 69 ± 10), we examine whether childhood adversity, adulthood trauma, and the interaction between them are associated with elevated levels of the systemic inflammatory marker high sensitivity C-reactive protein (hsCRP). All models were adjusted for age, gender, race, education, and year of data collection, as well as other possible confounds in follow-up sensitivity analyses. In our sample, 67% of individuals had experienced at least one traumatic event during adulthood, and those with childhood adversity were almost three times as likely to have experienced trauma as an adult. Childhood adversities and adulthood traumas were independently associated with elevated levels of hsCRP (β = 0.03, p = 0.01 and β = 0.05, p < 0.001, respectively). Those who had experienced both types of stress had higher levels of hsCRP than those with adulthood trauma alone, Estimate = −0.06, 95% CI [−0.003, −0.12], p = 0.04, but not compared to those with childhood adversity alone, Estimate = −0.06, 95% CI [0.03, −0.16], p = 0.19. There was no interaction between childhood and adulthood trauma exposure. To our knowledge, this is the first study to examine adulthood trauma exposure and inflammation in a large population-based sample, and the first to explore the interaction of childhood adversity and adulthood trauma with inflammation. Our study demonstrates the prevalence of trauma-related inflammation in the general population and suggests that childhood adversity and adulthood trauma are independently associated with elevated inflammation.