This study examines the relationship between residential contexts and epigenetic age acceleration (EAA) among older Black and White Americans. EAA is a significant biomarker that indicates premature aging, and understanding its determinants can help address health disparities.
Study Overview
The research draws on data from the Health and Retirement Study (HRS), which included non-Hispanic Black and White older adults who provided venous blood samples in 2016. The sample consisted of 3,187 participants with a mean age of 69. The authors employed multigroup structural equation modeling techniques to analyze how various residential features influence EAA.
Key residential factors investigated include:
- Racial clustering of residents
- Air pollution
- Greenspace availability
- Household incomes
- Perceived disorder in the neighborhood
The findings indicate that White respondents living in areas with a high concentration of other White residents exhibited lower EAA 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 found minimal significant relationships between residential contexts and EAA among Black participants, suggesting that the factors contributing to EAA may differ significantly between racial groups. The authors emphasize the role of concentrated privilege in predominantly White areas as a potential driver of health disparities.
What this study does not show
This study does not establish a causal relationship between residential context and epigenetic age acceleration, nor does it provide insights into the mechanisms underlying these disparities.
Evidence scorecard
- Analytic validity: Established
- Clinical validity: Not established
- Clinical utility: Not established
The evidence is based on primary research involving human participants.