School of Health Sciences, University of South Australia, Adelaide, Australia.
Am J Clin Nutr. 2010 Mar;91(3):771-6. doi: 10.3945/ajcn.2009.28648. Epub 2010 Jan 20.
Local fast-food environments have been increasingly linked to obesity and related outcomes. Individuals who are more sensitive to reward-related cues might be more responsive to such environments.
This study aimed to assess the moderating role of sensitivity to reward on the relation between residential fast-food restaurant exposure and fast-food consumption.
Four hundred fifteen individuals (49.6% men; mean age: 34.7 y) were sampled from 7 Montreal census tracts stratified by socioeconomic status and French/English language. The frequency of fast-food restaurant visits in the previous week was self-reported. Sensitivity to reward was self-reported by using the Behavioral Activation System (BAS) scale. Fast-food restaurant exposure within 500 m of the participants' residence was determined by using a Geographic Information System. Main and interactive effects of the BAS and fast-food restaurant exposure on fast-food consumption were tested with logistic regression models that accounted for clustering of observations and participants' age, sex, education, and household income.
Regression results showed a significant interaction between BAS and fast-food restaurant exposure (P < 0.001). Analysis of BAS tertiles indicated that the association between neighborhood fast-food restaurant exposure and consumption was positive for the highest tertile (odds ratio: 1.49; 95% CI: 1.20, 1.84; P < 0.001) but null for the intermediate (odds ratio: 1.03; 95% CI: 0.80, 1.34; P = 0.81) and lowest (odds ratio: 0.84; 95% CI: 0.51, 1.37; P = 0.49) tertiles.
Reward-sensitive individuals may be more responsive to unhealthful cues in their immediate environment.
当地快餐环境与肥胖和相关结果的关系日益密切。对与奖励相关的线索更敏感的个体可能对这种环境更敏感。
本研究旨在评估对奖励的敏感性在居住快餐餐厅暴露与快餐消费之间关系中的调节作用。
从 7 个蒙特利尔普查区中抽取了 415 名个体（49.6%为男性；平均年龄：34.7 岁），这些个体按照社会经济地位和法语/英语语言进行分层。前一周快餐餐厅的访问频率由自我报告。使用行为激活系统（BAS）量表自我报告对奖励的敏感性。使用地理信息系统确定参与者居住地 500 米范围内的快餐店数量。使用考虑到观察和参与者年龄、性别、教育程度和家庭收入聚类的逻辑回归模型，测试了 BAS 和快餐店暴露对快餐消费的主要和交互作用。
回归结果显示 BAS 和快餐店暴露之间存在显著的交互作用（P < 0.001）。BAS 三分位分析表明，居住环境附近快餐店的暴露与消费之间呈正相关，最高三分位（优势比：1.49；95%置信区间：1.20，1.84；P < 0.001），而中间三分位（优势比：1.03；95%置信区间：0.80，1.34；P = 0.81）和最低三分位（优势比：0.84；95%置信区间：0.51，1.37；P = 0.49）则无关联。
奖励敏感的个体可能对其周围环境中不健康的线索更敏感。
