Geographic Distribution of Social Utilities and their Impact on Diabetes Self-Management

Executive Summary

In the United States, the burden of diabetes is substantial and growing. As of 2021, about 38.4 million Americans, or 11.6% of the U.S. population, have diabetes.1 Furthermore, an estimated 97.6 million American adults, 38% of the adult population, have prediabetes, placing them at significantly elevated risk of developing type 2 diabetes without intervention.

Diabetes is not merely impacted by genetics and lifestyle. Factors of the built environment have a significant role in the self- management of diabetes as well. The availability of, and access to, resources ranging from transit options to nutritious food within one’s geographic location can determine outcomes when it comes to diabetes prevention, incidence, and management.

For example, the physical landscape of a neighborhood can dictate whether its residents cycle or walk to work, in tandem with public transportation, or whether they rely more heavily on personal private automobiles, be they cars, trucks, or vans, for transit and commuting. Similarly, food deserts, regions with limited access to affordable, healthy food, can arise from a lack of access to large affordable grocery stores due to distance, poor public transit, and socioeconomic status.

Vita Valens investigated the geographic distribution and incidence of a subset of the adult diabetic population of New York City, with the aim of developing a new diabetes-focused educational program. This paper investigates the use of incorporating factors of the built environment in the design and development of our educational program on diabetes self-management. Public data on correlated factors were leveraged to help understand the population in consideration, inform the development of materials, and shape the topics under discussion. By understanding the environmental factors that may contribute to diabetes incidence and outcomes, we developed an educational self-management program that uniquely addresses the challenges faced by the population we aimed to serve. We hope this model of data-driven preliminary research can serve as a model for other organizations interested in conducting self-management education efforts for chronic conditions like diabetes.

Background

Numerous studies have investigated the relationship between the geographic incidence of diabetes and diabetes-related complications, hinting at the sociodemographic and built- environmental factors that are at play when considering adequate access to health infrastructure. One study employed density- based clustering algorithms to identify geographic variation and the influence of location on the incidence of lower-extremity amputations among diabetic U.S. Medicare beneficiaries.2 Another study focused on diabetes-related acute complications identified a tangible relationship between such complications and metrics like median family income by identifying spatial clusters of acute complication incidence and correlating that with community-level sociodemographic factors.3 In New York City, there are notable inequities in the diabetic population. Recent data shows that over 800,000 adults in NYC—more than 11% of the adult population—were living with diagnosed diabetes in 2022.4 The prevalence of diabetes among adults in Queens and Brooklyn was both at 12%. These rates are higher than in Manhattan but lower than in the Bronx, where the rate is about 15%. Prevalence climbs sharply with age: among New Yorkers aged 45‐64, around 17%, and among those 65 and older, 26% report having diabetes.5 There are pronounced disparities along racial and ethnic lines, as well as neighborhood poverty levels: Black, Latino, and Asian/ Pacific Islander residents have diabetes prevalence nearly double that of White residents; similarly, people living in very high‐poverty neighborhoods have about a 15% prevalence, compared to 8% in low‐poverty areas.4  This data underscores the need for targeted educational interventions that address both awareness and management, especially in the most affected communities.
This sociodemographic impact of diabetes incidence is especially pronounced when examining regions in New York with a high percentage of adults with poorly controlled diabetes. Research conducted by the United Hospital Fund in 2022 shows that parts of the Bronx and Brooklyn, including Hunts Point – Mott Haven (18.2%) and East Flatbush – Flatbush (17.1%), show a very high incidence of adults with poorly controlled diabetes (that is, with A1c levels above 9%) in regions marked by poverty and historically underserved communities.6 The geography of unmanaged and poorly managed diabetes incidence has a lot to do with built environment attributes, such as access to healthy foods, crime level, the rural-urban matrix, and reliance on walking.7,8,9 A spatial analysis of county-level diabetes prevalence across the United States in 2010 found that the largest significant built environment-related variable correlated with diabetes was the percentage of population cycling or walking to work.10 In analyzing incidence data across New York City, transit deserts and the relative prevalence of driving can be used as an indicator of poorly managed diabetes, based on prior research around the built environment.
Similarly, food deserts and access to quality, affordable groceries can function as another factor that exacerbates the issue of diabetes self-management. Food deserts can be described as geographic areas where residents’ access to affordable, healthy food options (especially fresh fruits and vegetables) is restricted or nonexistent due to the absence of grocery stores within convenient traveling distance.11 In urban areas like New York, public transportation may help residents overcome the difficulties posed by distance, but economic forces have driven out many affordable grocery stores, making an individual’s food shopping trip require several connecting modes of transportation.

Methodology

Vita Valens identified geographic regions within the outer boroughs with high diabetes incidence based on the sample population to plan diabetes intervention programming. A data driven approach was employed to the planning and implementing of this intervention. Specifically, a geographic cluster analysis was conducted to identify areas with the highest concentrations of individuals living with diabetes. Based on our data, which is a subset of the individuals with diabetes in the NY metropolitan area, diabetes prevalence across the target population was analyzed.

To provide targeted programming that addresses built-environment factors, especially as it pertains to transit deserts and the reliance of private automobiles for transportation and commuting, Vita Valens cross-examined the diabetes incidence clusters obtained from a density-based clustering algorithm against the transit and commute data, as well as healthy food access data from NYC’s Environment and Health Data Portal.

Discussion

Our original dataset showed the highest incidence of diabetes in clusters 17 and 19, in South Brooklyn. To understand the population in these regions better, as well as the unique challenges of built environment that they face, we looked at NYC Environment and Health data from 2017-2021.

When looking at data on commuting modes, we identified a relatively higher percentage of adults commuting by car, truck, or van in the regions of clusters 17 and 19 in Brooklyn than other regions in Brooklyn and more broadly in the city. This kind of reliance on private automobiles for transportation can belie a lack of exercise outside of structured and intentional exercise, and can be an effective point of programming to convey the importance of incorporating physical activity into one’s diabetes self-management plan, especially when physical activity is not prompted by necessity to commute around the city.

Clusters 17 and 19 also have a high incidence of unhealthy food access, quantified by NYC Environment and Health data as the ratio of bodegas to supermarkets extant within the geographic area. Supermarkets tend to stock higher quality nutritious food at a lower price point than bodegas, which tend to privilege more processed and unhealthy foods at a higher price point. When an area has a greater volume of bodegas than supermarkets, easy local access to quality food is lower than neighborhoods that have a greater number of supermarkets in them. Given the higher incidence of bodegas over supermarkets in these neighborhoods, we tailored our educational content towards strategies for maximizing the amount of nutritious food one can find in the area. This was achieved by providing maps of local supermarkets and food pantries, as well as transit options to reach them, to support patients and enable them to opt in for more nutritious food sources to the extent possible. This was also achieved by educating patients on food groups and ingredients in general, so that they can maximize nutrition even when accessed through a bodega.

This study focuses on leveraging data about the built environment of neighborhoods to tailor interventions on specific chronic conditions to address the real landscape of these patients’ everyday lives. Educating on the importance of cycling or walking as a means of transportation, as well as educating on nutrition and how to best access it within your local community, can help individuals with diabetes manage their conditions within the context of their home environments and provide more effective tools to mitigate adverse effects. Additional research focusing on more than just two high-density neighborhoods could provide greater insight into the efficacy of such data-driven tailoring of self-management education content. This study is a first step in this direction to providing more customized intervention contents for the patient populations one is trying to serve.

Conclusion

This study focuses on leveraging data about the built environment of neighborhoods to tailor interventions on specific chronic conditions to address the real landscape of these patients’ everyday lives. Educating on the importance of cycling or walking as a means of transportation, as well as educating on nutrition and how to best access it within your local community, can help individuals with diabetes manage their conditions within the context of their home environments and provide more effective tools to mitigate adverse effects. Additional research focusing on more than just two high-density neighborhoods could provide greater insight into the efficacy of such data-driven tailoring of self-management education content. This study is a first step in this direction to providing more customized intervention contents for the patient populations one is trying to serve.

Citations

  1. https://www.niddk.nih.gov/health-information/health-statistics/diabetes-statistics/
  2. David J. Margolis, Ole Hoffstad, Jeffrey Nafash, Charles E. Leonard, Cristin P. Freeman, Sean Hennessy, Douglas J. Wiebe; Location, Location, Location: Geographic Clustering of Lower-Extremity Amputation Among Medicare Beneficiaries With Diabetes. Diabetes Care 1 November 2011; 34 (11): 2363–2367. https://doi.org/10.2337/dc11-0807
  3. Butalia, S., Patel, A. B., Johnson, J. A., Ghali, W. A., & Rabi, D. M. (2017). Geograph- ic Clustering of Acute Complications and Sociodemographic Factors in Adults with Type 1 Diabetes. Canadian journal of diabetes, 41(2), 132–137. https://doi.org/10.1016/j.jcjd.2016.08.224
  4. https://www.nyc.gov/site/doh/about/press/pr2025/new-report-highlights-stark-dia-betes-inequities-2025.page
  5. https://www.nyc.gov/assets/doh/downloads/pdf/epi/databrief146-diabetes-inequities.pdf
  6. Salois MJ. Obesity and diabetes, the built environment, and the ‘local’ food economy in the United States, 2007. Econ Hum Biol 2012;10(1):35–42.
  7. Green C, Hoppa RD, Young TK, Blanchard JF. Geographic analysis of diabetes prevalence in an urban area. Soc Sci Med 2003;57(3):551–60.
  8. Hu FB, Sigal RJ, Rich-Edwards JW, Colditz GA, Solomon CG, Willett WC, et al. Walking compared with vigorous physical activity and risk of type 2 diabetes in women: a prospective study. JAMA 1999;282(15):1433–9.
  9. Hipp JA, Chalise N. Spatial Analysis and Correlates of County-Level Diabetes Prevalence, 2009–2010. Prev Chronic Dis 2015;12:140404. DOI: http://dx.doi.org/10.5888/pcd12.140404.
  10. https://foodispower.org/access-health/food-deserts/
  11. https://a816-dohbesp.nyc.gov/IndicatorPublic/data-explorer/walking-driving-and-cycling/?id=2415#display=map

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