This study examines the relationship between residential contexts and epigenetic age acceleration (EAA) among older Black and White Americans, utilizing data from the Health and Retirement Study conducted between 2010 and 2016. EAA is a significant biomarker indicative of premature aging, and understanding its determinants can provide insights into health disparities.
The research involved 3,187 participants, with a mean age of 69 years, who provided venous blood samples in 2016. The authors employed multigroup structural equation modeling techniques to analyze the data, focusing on the interplay between EAA and five specific features of residential contexts: racial clustering of residents, air pollution, greenspace availability, household incomes, and perceived disorder.
Findings
The study found that White respondents living in areas with a high concentration of other White residents exhibited lower levels of EAA in 2016 compared to their peers in less racially homogeneous areas. Notably, higher household incomes in predominantly White neighborhoods accounted for approximately 25% of this association.
In contrast, the study did not find significant relationships between residential contexts and EAA among Black participants, suggesting that the factors influencing EAA may differ across racial groups. These findings highlight the concept of concentrated privilege in predominantly White areas as a potential driver of health and aging disparities between Black and White populations.
The authors emphasize the importance of considering residential context when examining health outcomes and suggest that further research is needed to explore the underlying mechanisms contributing to these disparities.
What this study does not show
This study does not establish direct causation between residential contexts and epigenetic age acceleration, nor does it provide insights into the biological mechanisms at play.
Evidence scorecard
- Analytic validity: Established
- Clinical validity: Not established
- Clinical utility: Not established
The evidence is based on primary research involving human participants.