Neighborhood Food Environment, Diet, and Obesity Among Los Angeles County Adults, 2011.
Neighborhood Food Environment, Diet, and Obesity Among Los Angeles County Adults, 2011.
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DOI：
10.5888/pcd12.150078
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发表时间：
2015-09-03
影响因子：
5.5
通讯作者：
Sturm R
中科院分区：
文献类型：
--
作者：
Mejia N;Lightstone AS;Basurto-Davila R;Morales DM;Sturm R
本研究的目的是检查是否存在关联的数量和类型的食品店在附近和饮食摄入量和身体质量指数（BMI）之间的成年人在洛杉矶县。我们还评估了这种关联是否取决于食品环境的地理大小。我们分析了2011年洛杉矶县健康调查的数据。我们以受访者的居住地址为中心创建了缓冲区（半径从0.25英里到3.0英里），并在每个缓冲区中按类型计算了食品店的数量。因变量为每周水果和蔬菜、含糖饮料和快餐的摄入量; BMI;超重（BMI ≥25.0 kg/m2）或肥胖（BMI ≥30.0 kg/m2）。解释性变量是分类为快餐店、便利店、小食品店、杂货店和超市的商店数量。估计所有解释变量和缓冲区大小组合的回归（共150个效应）。在调整多重比较后，150个效应中只有2个显著。在不可步行区域（3.0英里半径）的快餐店数量与快餐消费呈正相关，而在可步行距离（0.25英里半径）的便利店数量与肥胖呈负相关。在洛杉矶县的成年人中，几乎没有证据表明受访者的住所与食品店的距离与饮食摄入量或BMI之间存在关联。对于零发现的一个可能的解释是，由于机动化交通，购物模式与洛杉矶县的社区关系很弱。
The objective of this study was to examine whether an association exists between the number and type of food outlets in a neighborhood and dietary intake and body mass index (BMI) among adults in Los Angeles County. We also assessed whether this association depends on the geographic size of the food environment. We analyzed data from the 2011 Los Angeles County Health Survey. We created buffers (from 0.25 to 3.0 miles in radius) centered in respondents’ residential addresses and counted the number of food outlets by type in each buffer. Dependent variables were weekly intake of fruits and vegetables, sugar-sweetened beverages, and fast food; BMI; and being overweight (BMI ≥25.0 kg/m2) or obese (BMI ≥30.0 kg/m2). Explanatory variables were the number of outlets classified as fast-food outlets, convenience stores, small food stores, grocery stores, and supermarkets. Regressions were estimated for all sets of explanatory variables and buffer size combinations (150 total effects). Only 2 of 150 effects were significant after being adjusted for multiple comparisons. The number of fast-food restaurants in nonwalkable areas (in a 3.0-mile radius) was positively associated with fast-food consumption, and the number of convenience stores in a walkable distance (in a 0.25-mile radius) was negatively associated with obesity. Little evidence was found for associations between proximity of respondents’ homes to food outlets and dietary intake or BMI among adults in Los Angeles County. A possible explanation for the null finding is that shopping patterns are weakly related to neighborhoods in Los Angeles County because of motorized transportation.