Geospatial Analysis of the Social Determinants of Health of Participants of a Diabetes Management Program to Evaluate Enrollment of Vulnerable Populations

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The map shows characteristics of participants in a diabetes education program in South Carolina aggregated at the zip code level. Five small maps show each zip code color coded by the average of the following characteristics: annual income, educational attainment, and drive time between each participant and the closest grocery store, pharmacy, and hospital. These characteristics were used to calculate a composite index (ie, the DBI), for each participant. The 5 smaller maps surround a larger map of South Carolina that shows the average DBI of participants living in each zip code. Each component was weighted when calculating the index: annual income, 35%; educational attainment, 25%; and the drive time between participants and the closest grocery store, 15%; pharmacy, 15%; and hospital, 10%.

Figure.
Diabetes Burden Index (DBI), by zip code, South Carolina, October 2023. The DBI evaluates the cumulative burden that HED program participants face in managing their diabetes. Scores range from 0 (lowest burden) to 1 (highest burden). The index considers annual income, educational attainment, and driving time to the closest grocery store, pharmacy, and hospital; components were weighted according to values in the table. Sources: South Carolina Department of Health and Environmental Control, US Census Bureau, Esri, Data Axle. Abbreviations: GED, general educational development; HED, South Carolina Health Extension for Diabetes program.

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