Disparities in Stress Exposure and Later-Life Disability.

Background and Objectives: Drawing from cumulative inequality theory and the weathering hypothesis, this study examined the relationship between life-course stress exposure (measured cumulatively and by domains) and the onset of disability in later life among White, Black, U.S.-born Hispanic, and foreign-born Hispanic older adults. Research Design and Methods: Cross-sectional and longitudinal models were estimated using nationally representative data from the Health and Retirement Study ( Results: At Wave 1, higher odds of disability occurrence were associated with cumulative stress burden (CSB; odds ratio [OR] = 4.93, 95% confidence interval [CI]: 2.95-8.23). In a model specifying domains of stressors, disability occurrence was associated with childhood financial strain (OR = 1.22, CI: 1.01-1.46), lifetime traumatic events (OR = 1.92, CI: 1.41-2.62), neighborhood disadvantage (OR = 1.32, CI: 1.01-1.73), and major lifetime discrimination (OR = 1.64, CI: 1.12-2.41). Over time, earlier onset of disability was associated with CSB (β = -0.39), childhood traumatic events (β = -0.16), adult financial strain (β = -0.17), everyday discrimination (β = -0.15), and major lifetime discrimination (β = -0.13). The effect of childhood traumatic events on the transition to disability was stronger for U.S.-born Hispanic adults than White adults (occurring 33% earlier). Discussion and Implications: To reduce racial, ethnic, and nativity disparities in disability, it is important to consider the historical and structural disadvantages associated with stress exposure across the life course. It is also important to acknowledge that nativity influences stratification processes associated with disparities in racial and ethnic health trajectories.