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# Childhood segregation and cardiovascular disease onset in Black and White Americans
- URL: https://www.coios.me/childhood-segregation-and-cardiovascular-disease-onset-in/
- Published: 2026-10-25T11:48:20.000Z
- Updated: 2026-10-25T12:38:20.000Z
- Description: Childhood residential segregation appeared to delay cardiovascular disease or hypertension in White people and hasten it in Black people.
- Author: Daniel Ryan
- Tags: Health today, Heart and stroke, What linked data reveals, Health systems and access, United States, #peer-reviewed, #refines, #item, #source-2026-10, #score-60

The study tested whether childhood residential racial segregation causes later cardiovascular disease (CVD) or hypertension. Railroad layouts in Northern US cities, set before the Great Migration, served as an instrument for segregation. Ananat's railroad data were linked to the birthplaces of 829 Black and 1,262 White Panel Study of Income Dynamics participants. Race-stratified accelerated failure time models followed them to 2023, adjusting for other railroad features, socioeconomic status and birth year. Segregation was estimated to delay onset of CVD or hypertension in White people and to hasten it in Black people. Instrument strength and confidence intervals varied by model, and standard confounder-adjusted models showed much weaker effects in the same direction.

*Why it is interesting: Most evidence linking segregation to heart disease is associational. This study uses a natural experiment to test whether childhood segregation causes Black–White differences in cardiovascular disease onset.*

Source

[American Journal of Epidemiology, 23 October 2026](https://doi.org/10.1093/aje/kwag276?ref=coios.me)

Paper

Is segregation bad for your heart?: a natural experiment for residential racial segregation exposure during childhood and cardiovascular disease risk

Authors

Schwartz GL, Hernandez MA

DOI

10.1093/aje/kwag276

Type

Peer-reviewed article

Design

Instrumental-variable natural experiment using railroad-track configuration as an instrument for metropolitan segregation, linked to PSID birthplaces (829 Black, 1,262 White; 1968-1994 cohort followed to 2023), race-stratified accelerated failure time models

Verdict

Refines prior evidence

Driver

[Heart and stroke](https://www.coios.me/d-cardiovascular/)

Driver

[What linked data reveals](https://www.coios.me/d-linked-data/)

Driver

[Health systems and access](https://www.coios.me/d-health-systems/)