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Journal of Urban Health

, Volume 85, Issue 2, pp 206–216 | Cite as

Comparing Perception-Based and Geographic Information System (GIS)-Based Characterizations of the Local Food Environment

  • Latetia V. Moore
  • Ana V. Diez RouxEmail author
  • Shannon Brines
Article

Abstract

Measuring features of the local food environment has been a major challenge in studying the effect of the environment on diet. This study examined associations between alternate ways of characterizing the local food environment by comparing Geographic Information System (GIS)-derived densities of various types of stores to perception-based measures of the availability of healthy foods. Survey questions rating the availability of produce and low-fat products in neighborhoods were aggregated into a healthy food availability score for 5,774 residents of North Carolina, Maryland, and New York. Densities of supermarkets and smaller stores per square mile were computed for 1 mile around each respondent’s residence using kernel estimation. The number of different store types in the area was used to measure variety in the food environment. Linear regression was used to examine associations of store densities and variety with reported availability. Respondents living in areas with lower densities of supermarkets rated the selection and availability of produce and low-fat foods 17% lower than those in areas with the highest densities of supermarkets (95% CL, −18.8, −15.1). In areas without supermarkets, low densities of smaller stores and less store variety were associated with worse perceived availability of healthy foods only in North Carolina (8.8% lower availability, 95% CL, −13.8, −3.4 for lowest vs. highest small-store density; 10.5% lower 95% CL, −16.0, −4.7 for least vs. most store variety). In contrast, higher smaller store densities and more variety were associated with worse perceived healthy food availability in Maryland. Perception- and GIS-based characterizations of the environment are associated but are not identical. Combinations of different types of measures may yield more valid measures of the environment.

Keywords

Environment Neighborhoods Food GIS Survey assessment. 

Notes

Acknowledgements

This work was supported by grant R01 HL071759 (Dr. Ana V. Diez Roux) from the National Heart, Lung, and Blood Institute and by grant R24 HD047861 from the Columbia Center for the Health of Urban Minorities (Columbia University, New York, New York).

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Copyright information

© The New York Academy of Medicine 2008

Authors and Affiliations

  • Latetia V. Moore
    • 1
  • Ana V. Diez Roux
    • 1
    Email author
  • Shannon Brines
    • 1
  1. 1.University of MichiganDepartment of Epidemiology4648 SPH I Ann ArborUSA

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