This study examines the relationship between residential contexts and epigenetic age acceleration (EAA) among older Black and White Americans. EAA is a biomarker that indicates premature aging, and understanding its determinants can provide insights into health disparities.
Study Overview
Conducted using data from the Health and Retirement Study (HRS) between 2010 and 2016, the research involved 3,187 non-Hispanic Black and White older adults, with a mean age of 69. Participants provided venous blood samples, which were analyzed to assess EAA using various epigenetic clocks, including GrimAge, PhenoAge, and DunedinPoAm38.
The researchers employed multigroup structural equation modeling to explore the connections between EAA and several residential context features. These features included:
- Racial clustering of residents
- Air pollution levels
- Greenspace availability
- Household incomes
- Perceived disorder in the neighborhood
Findings indicated 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. This suggests that the factors influencing EAA may differ significantly across racial groups, highlighting the need for a nuanced understanding of how environmental and socioeconomic factors intersect with health outcomes.
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 evidence of direct health outcomes resulting from changes in residential environments.
Evidence scorecard
- Analytic validity: Established
- Clinical validity: Not established
- Clinical utility: Not established
The evidence class is primary_research with human status unclassified.