The hustle and bustle of city life, often linked to stress and pollution, may surprisingly offer a degree of protection against stroke, according to a recent study from the University of Michigan. Researchers found that individuals living in more densely developed areas—characterized by a greater concentration of buildings, sidewalks, and infrastructure—experienced a 2.5% lower risk of first-time stroke compared to those in less developed regions. This finding challenges conventional wisdom and opens new avenues for understanding stroke risk factors.
The research, published in the journal Development intensity and incident stroke risk: a longitudinal study of the REGARDS cohort, tracked over 25,000 adults across the United States for more than a decade. The study utilized data from REGARDS (REasons for Geographic And Racial Differences in Stroke), a long-term study focused on health disparities in the “stroke belt”—an 11-state region in the Southeastern U.S. Where stroke mortality rates are disproportionately high among Black Americans.
Beyond Urban vs. Rural: Measuring Development Intensity
Previous research attempting to link neighborhood characteristics to stroke risk often relied on broad categorizations of “urban” versus “rural,” which proved inconsistent, explained Cathy Antonakos, research specialist senior in the U-M School of Kinesiology and the study’s first author. “Past research has been inconsistent, perhaps since it relied on static urban/rural labels,” she said. To overcome this limitation, Antonakos and her team employed satellite data to measure development intensity over time. They analyzed 5-mile road networks surrounding over 34,000 residential locations, tracking changes in building density and infrastructure.
This approach allowed researchers to move beyond simple urban/rural classifications and capture a more nuanced picture of the environment. Importantly, the link between higher development intensity and reduced stroke risk remained consistent even after accounting for factors like age, race, sex, and pre-existing conditions such as diabetes and high blood pressure. This suggests that the built environment itself plays a role in stroke prevention, independent of individual health characteristics.
How Cityscapes Might Protect Against Stroke
While the study doesn’t definitively pinpoint the mechanisms at play, researchers hypothesize that the features common in highly developed areas contribute to a healthier lifestyle. “High-intensity development typically includes greater housing density and more commercial/retail outlets,” Antonakos explained. “These areas are more likely to feature compact land uses with access to health care, food stores, public transport and physical activity infrastructure like sidewalks, bike facilities and parks.”
Access to these amenities can encourage physical activity, promote healthier eating habits, and facilitate quicker access to medical care—all factors known to reduce stroke risk. The convenience of walkable neighborhoods, for example, can reduce reliance on cars and increase opportunities for exercise. Similarly, proximity to grocery stores and healthcare facilities can improve access to nutritious food and timely medical attention.
Implications for Public Health and Urban Planning
The findings have important implications for both physicians and urban planners. For healthcare providers, the study highlights the importance of considering neighborhood-level factors when assessing a patient’s stroke risk. “For physicians, the study suggests that neighborhood-level factors may influence first-time stroke risk, in addition to individual-level factors,” Antonakos noted. Recognizing the impact of the environment could lead to more targeted prevention strategies.
For urban planners, the research underscores the value of creating environments that support cardiovascular health and physical activity. Enhancing neighborhoods with features like sidewalks, bike lanes, parks, and accessible public transportation could contribute to a significant reduction in stroke incidence. This approach aligns with broader efforts to create more livable and sustainable cities.
The research team is now focused on identifying the specific environmental features that are most strongly associated with reduced stroke risk. This next phase of the study will provide more detailed insights into how urban design can be leveraged to improve public health. Co-authors on the study include Ian-Marshall Lang, Stephanie Miller and Natalie Colabianch, University of Michigan; Suzanne Judd, University of Alabama at Birmingham; and Matthew Flaherty, University of Cincinnati Academic Health Center.
The study was supported by cooperative agreement U01 NS041588, co-funded by the National Institute of Neurological Disorders and Stroke, National Institute on Aging, National Institutes of Health and Department of Health and Human Services, as well as additional funding from the NINDS and NIA of the NIH under award numbers RF1NS127606, R01NS127606, and R01NS092706. The research as well benefited from computational resources provided by Advanced Research Computing at the University of Michigan.
Disclaimer: This article provides information for general knowledge and informational purposes only, and does not constitute medical advice. It is essential to consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
The University of Michigan researchers plan to continue investigating the specific environmental factors that contribute to stroke risk reduction. Further updates on this research will be available through the University of Michigan Health website. Share this article to spread awareness about the potential health benefits of well-planned urban environments.
