What question did this study set out to answer?

The aim is to examine how residential segregation relates to breast cancer incidence in diverse female populations.

July 26, 2026Cancer Causes & ControlOpen Access

Associations of neighborhood racial and ethnic, economical, and educational segregation with breast cancer risk: The Multiethnic ohort Study

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Randomized trial explores breast cancer risk linked to neighborhood segregation in females, suggesting implications for health disparities.

The aim is to examine how residential segregation relates to breast cancer incidence in diverse female populations.
Prospective study conducted from 1993–1996 through December 2019.
Involved 101,785 female participants aged 45–75 in California and Hawai‘i.
Multivariable Cox regression assessed associations between segregation measures and breast cancer incidence.
In California, increased breast cancer risk was linked to higher income segregation (HR 1.12, 95% CI 1.00–1.25, P trend = 0.001) and education segregation (HR 1.15, 95% CI 1.01–1.31, P trend = 0.01).
Latina females showed heightened risk with increased privilege in various segregation measures (P trends < 0.05).
No significant associations were found in Hawai‘i.

Ihenacho et al. (2026) studied this question.

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Randomized trial explores breast cancer risk linked to neighborhood segregation in females, suggesting implications for health disparities.