Evaluating the Effect of Neighborhood-level Disadvantage on Brain Health: An Imaging Epidemiology Study

What the study found

Living in the most disadvantaged neighborhoods was associated with a higher brain age gap (about 2.7 to 3.0 years), lower total brain volume and more white matter hyperintensity, after adjusting for age and sex.

Limitations

Cross-sectional and associational. Deprivation index is area-level, not individual exposure. Clinical referral sample. Only 116 to 129 patients sat in the most disadvantaged category. Models adjusted for age and sex only.

Neurodesign interpretation

This is a reason to take place seriously as a health exposure, and a warning about how that gets written up. Nothing here isolates the built environment from poverty itself. Any claim that a neighborhood's design ages the brain would be borrowed strength.

Possible design implications

None at building scale. The index bundles income, education, employment and housing, so no physical feature of a neighborhood can be singled out from this study.

Why it stays in the corpus

Retain as exposure ecology, not as an architecture effect.

Study design

Retrospective cross-sectional analysis of consecutive routine brain MRI

Population

2,826 clinical MRI patients without radiologic evidence of disease (mean age 53, 1,732 female), Wisconsin

Setting

Academic medical center and community partners

Field

Exposure ecology, imaging epidemiology

Mechanism

Chronic neighborhood disadvantage, neurovascular injury, brain aging

Spatial variable

Area Deprivation Index of residential neighborhood

Keywords

area deprivation index, brain age, MRI, neighborhood disadvantage, white matter hyperintensity