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Am J Public Health. 2005 Sep;95(9):1575-81.

Clustering of fast-food restaurants around schools: a novel application of spatial statistics to the study of food environments.

Author information

  • 1Division of Adolescent and Young Adult Medicine, Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA. bryn.austin@childrens.harvard.edu

Abstract

OBJECTIVES:

We examined the concentration of fast food restaurants in areas proximal to schools to characterize school neighborhood food environments.

METHODS:

We used geocoded databases of restaurant and school addresses to examine locational patterns of fast-food restaurants and kindergartens and primary and secondary schools in Chicago. We used the bivariate K function statistical method to quantify the degree of clustering (spatial dependence) of fast-food restaurants around school locations.

RESULTS:

The median distance from any school in Chicago to the nearest fast-food restaurant was 0.52 km, a distance that an adult can walk in little more than 5 minutes, and 78% of schools had at least 1 fast-food restaurant within 800 m. Fast-food restaurants were statistically significantly clustered in areas within a short walking distance from schools, with an estimated 3 to 4 times as many fast-food restaurants within 1.5 km from schools than would be expected if the restaurants were distributed throughout the city in a way unrelated to school locations.

CONCLUSIONS:

Fast-food restaurants are concentrated within a short walking distance from schools, exposing children to poor-quality food environments in their school neighborhoods.

Comment in

PMID:
16118369
[PubMed - indexed for MEDLINE]
PMCID:
PMC1449400
Free PMC Article

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