Neighborhood disadvantage is associated with biological aging: Intervention-induced enhancement of couple functioning confers resilience.

The accelerated pace of biological aging predicts mortality and morbidity later in life. The current study examines whether a change in supportive couple functioning buffers accelerated aging associated with stressful community environments among Black Americans who live in rural, Southern, disadvantaged neighborhoods. We examined 348 Black American middle-aged adults assigned randomly to receive the Protecting Strong African American Families (ProSAAF) intervention or a control condition. The program was designed to enhance supportive couple functioning among Black Americans. We used DunedinPoAm to quantify the methylation pace of aging and employed the Area Deprivation Index at the census block group level to measure neighborhood disadvantage. Neighborhood disadvantage was associated with the accelerated pace of aging. Further, participation in ProSAAF enhanced supportive couple functioning, and improvement in couple functioning protected participants from the harmful effects of neighborhood disadvantage on the accelerated pace of aging. These findings supported mediated moderation and suggested that family-based prevention programs that enhance couple support may decrease the erosive effects of neighborhood disadvantage and improve prospects for healthy aging among rural, Southern, Black Americans living in difficult circumstances. This may provide a supplemental strategy for decreasing health disparities due to neighborhood disadvantage by enhancing family systems.