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Purpose. To examine whether urban form is associated with body size within a densely-settled city.Design. Cross-sectional analysis using multilevel modeling to relate body mass index (BMI) to built environment resources.Setting. Census tracts (n = 1989) within the five boroughs of New York City.Subjects. Adult volunteers (n = 13,102) from the five boroughs of New York City recruited between January 2000 and December 2002.Measures. The dependent variable was objectively-measured BMI. Independent variables included land use mix; bus and subway stop density; population density; and intersection density. Covariates included age, gender, race, education, and census tract–level poverty and race/ethnicity.Analysis. Cross-sectional multilevel analyses.Results. Mixed land use (Beta = 2.55, p < .01), density of bus stops (Beta = −.01, p < .01) and subway stops (Beta = −.06, p < .01), and population density (Beta = −.25, p < .001), but not intersection density (Beta = −.002) were significantly inversely associated with BMI after adjustment for individual- and neighborhood-level sociodemographic characteristics. Comparing the 90th to the 10th percentile of each built environment variable, the predicted adjusted difference in BMI with increased mixed land use was −.41 units, with bus stop density was −.33 units, with subway stop density was −.34 units, and with population density was −.86 units.Conclusion. BMI is associated with built environment characteristics in New York City.

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