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 considered a crucial biomarker for assessing premature aging, and understanding its disparities can provide insights into health inequalities.
The research involved a sample of 3,187 non-Hispanic Black and White older adults, with a mean age of 69, 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 various residential factors, including racial clustering, air pollution, greenspace, household incomes, and perceived disorder.
Findings indicate that White respondents residing in areas with a high concentration of other White residents in 2010 exhibited lower levels of EAA by 2016 compared to their peers in less racially homogeneous neighborhoods. Notably, higher household incomes in predominantly White areas accounted for approximately 25% of this association. In contrast, the study found minimal significant relationships between residential contexts and EAA among Black participants.
The robustness of these findings was confirmed through various control measures and sensitivity analyses, suggesting that concentrated privilege in predominantly White neighborhoods may be a contributing factor to health and aging disparities between Black and White Americans.
The implications of this research extend beyond the immediate findings, as it highlights the need for further investigation into how residential environments influence health outcomes. The authors suggest several avenues for future research that could enhance understanding of these dynamics.
What this study does not show
This study does not establish a direct causal relationship between residential context and epigenetic age acceleration, nor does it explore the mechanisms behind the observed disparities in detail.
Evidence scorecard
- Analytic validity: Established
- Clinical validity: Not established
- Clinical utility: Not established
The evidence is based on primary research involving human participants.