Epigenetic Clocks Moderate the Impact of Marital Status Transitions on Health in Older Adults

Abstract

Chronological age is commonly used to study aging, but biological aging may more accurately reflect cumulative life experiences and psychosocial stressors. This study examines whether epigenetic clocks function as markers of resilience by assessing how marital status transitions are associated with biological aging and health outcomes in later life. Using data from 1,449 non-Hispanic White participants in the Health and Retirement Study, we analyzed thirteen epigenetic clocks derived from DNA methylation profiles. Ordinary least squares and Cox regression models assessed the associations between marital transitions, depressive symptoms, and mortality, adjusting for genetic and social factors. Interaction terms tested whether epigenetic clocks moderated these associations. Results showed that divorce and widowhood were linked to accelerated epigenetic aging. Marital status changes were associated with increased depressive symptoms but not with mortality risk. GrimAge and DunedinPACE moderated the relationship between marital disruption and depressive symptoms, while Zhang and GrimAge moderated the relationship with mortality risk. Biologically older individuals, particularly men, exhibited greater resilience to these transitions. These findings raise the possibility that epigenetic clocks reflect accumulated life experiences and psychosocial adaptation, potentially including elements of resilience in older adults.