Is adolescent body mass index and waist circumference associated with the food environments surrounding schools and homes? A longitudinal analysis
Is adolescent body mass index and waist circumference associated with the food environments surrounding schools and homes? A longitudinal analysis
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DOI：
10.1186/s12889-018-5383-z
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发表时间：
2018-05-02
影响因子：
4.5
通讯作者：
Griffiths, Claire
中科院分区：
文献类型：
--
作者：
Green, Mark A.;Radley, Duncan;Griffiths, Claire
背景资料：有相当大的兴趣，在获得不健康的食物选择的作用，作为一个决定因素的体重状态有冲突的文献，以存在这样一个协会，部分原因是占主导地位的横断面研究设计和不一致的定义的食品环境。我们研究的目的是使用纵向数据来检验食品环境的特征是否与青少年体重状况的测量相关。数据收集自利兹（英国）的中学，包括7学年的测量结果。（年龄11/12）、9（13/14）和11（15/16）结果变量，对于体重状态，是标准化的体重指数和标准化的腰围。解释性变量包括位于个人家或学校半径1公里范围内的快餐店、超市和“其他零售店”的数量，以及这些地点之间的预计行进路线（500 m缓冲区）拟合多水平模型分析（调整混杂因素）之间的解释和结果变量我们还检查了我们的结果变量在每个时间段之间的变化。我们发现食物环境和青少年体重状况之间几乎没有联系。在检测到显着的关联，他们主要表现出一个积极的关联之间的一些设施和体重状况（虽然效果大小很小）。检查时间段之间的体重状况的变化主要产生不显着或不一致的associations.Conclusions：我们的研究发现很少有一致的证据之间的关联功能的食品环境和青少年的体重状况。这表明，如果没有额外的战略支持，侧重于食品环境的政策努力在解决肥胖症高发率方面可能效果有限。
Background: There has been considerable interest in the role of access to unhealthy food options as a determinant of weight status There is conflict across the literature as to the existence of such an association, partly due to the dominance of cross-sectional study designs and inconsistent definitions of the food environment. The aim of our study is to use longitudinal data to examine if features of the food environment are associated to measures of adolescent weight status.Methods: Data were collected from secondary schools in Leeds (UK) and included measurements at school years 7 (ages 11/12), 9 (13/14), and 11 (15/16) Outcome variables, for weight status, were standardised body mass index and standardised waist circumference. Explanatory variables included the number of fast food outlets, supermarkets and 'other retail outlets' located within a 1 km radius of an individual's home or school, and estimated travel route between these locations (with a 500 m buffer) Multi-level models were fit to analyse the association (adjusted for confounders) between the explanatory and outcome variables We also examined changes in our outcome variables between each time period.Results: We found few associations between the food environment and measures of adolescent weight status. Where significant associations were detected, they mainly demonstrated a positive association between the number of amenities and weight status (although effect sizes were small). Examining changes in weight status between time periods produced mainly non-significant or inconsistent associations.Conclusions: Our study found little consistent evidence of an association between features of the food environment and adolescent weight status. It suggests that policy efforts focusing on the food environment may have a limited effect at tackling the high prevalence of obesity if not supported by additional strategies.