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  • Title: Food environments and childhood weight status: effects of neighborhood median income.
    Author: Fiechtner L, Sharifi M, Sequist T, Block J, Duncan DT, Melly SJ, Rifas-Shiman SL, Taveras EM.
    Journal: Child Obes; 2015 Jun; 11(3):260-8. PubMed ID: 25923838.
    Abstract:
    BACKGROUND: A key aspect of any intervention to improve obesity is to better understand the environment in which decisions are being made related to health behaviors, including the food environment. METHODS: Our aim was to examine the extent to which proximity to six types of food establishments is associated with BMI z-score and explore potential effect modification of this relationship. We used geographical information software to determine proximity from 49,770 pediatric patients' residences to six types of food establishments. BMI z-score obtained from the electronic health record was the primary outcome. RESULTS: In multivariable analyses, living in closest proximity to large (β, -0.09 units; 95% confidence interval [CI], -0.13, -0.05) and small supermarkets (-0.08 units; 95% CI, -0.11, -0.04) was associated with lower BMI z-score; living in closest proximity to fast food (0.09 units; 95% CI, 0.03, 0.15) and full-service restaurants (0.07 units; 95% CI, 0.01, 0.14) was associated with a higher BMI z-score versus those living farthest away. Neighborhood median income was an effect modifier of the relationships of convenience stores and full-service restaurants with BMI z-score. In both cases, closest proximity to these establishments had more of an adverse effect on BMI z-score in lower-income neighborhoods. CONCLUSIONS: Living closer to supermarkets and farther from fast food and full-service restaurants was associated with lower BMI z-score. Neighborhood median income was an effect modifier; convenience stores and full-service restaurants had a stronger adverse effect on BMI z-score in lower-income neighborhoods.
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