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Clustering of Fast-Food Restaurants Around Schools: A Novel Application of Spatial Statistics to the Study of Food Environments

S. Bryn Austin, ScD, Steven J. Melly, MS, Brisa N. Sanchez, ScM, Aarti Patel, BA, Stephen Buka, ScD and Steven L. Gortmaker, PhD

S. Bryn Austin is with the Division of Adolescent and Young Adult Medicine at Children’s Hospital, Boston, Mass, and the Department of Society, Human Development, and Health, Harvard School of Public Health, Boston. Aarti Patel is with the Division of Adolescent and Young Adult Medicine at Children’s Hospital. Steven J. Melly is with the Department of Biostatistics and the Department of Environmental Health at the Harvard School of Public Health, Boston. Brisa N. Sanchez is with the Department of Biostatistics at the Harvard School of Public Health. Stephen Buka and Steven L. Gortmaker are with the Department of Society, Human Development, and Health at the Harvard School of Public Health.


Figure 1
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  		FIGURE 1—— Locations of schools and fast-food restaurants in Chicago.

 

Figure 2
Figure 2
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  		FIGURE 2—— Clustering of fast-food restaurants in Chicago: (a) bivariate K function plot with 95% confidence intervals showing clustering of fast-food restaurants around schools and (b) relative concentration of fast-food restaurants around schools.

 




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