Auburn University Harrison School of Pharmacy, Department of Health Outcomes Research and Policy, 033 James E. Foy Hall, Auburn, AL36849, USA.
Auburn University College of Human Sciences, Department of Human Development and Family Studies, Auburn, AL, USA.
Public Health Nutr. 2019 Feb;22(2):287-294. doi: 10.1017/S1368980018003142. Epub 2018 Nov 28.
Certain factors, such as food quality, label content and grocery characteristics, may be considered when purchasing foods. Food availability in the home has been shown to influence dietary behaviours, also associated with delay discounting (DD). The present study sought to characterize the relationships between DD, food purchasing considerations and healthfulness of foods in the home.
A cross-sectional, online survey of adults (n 477) was conducted with the following measures: DD, consideration of food quality (nutrition, taste) and grocery characteristics (price, ease of preparation, shelf-life) while shopping, use of food labels and food availability in the home. DD was assessed by the area under the delay discounting curve (AUC) using a binary choice task. Greater AUC reflects lower DD. Structural equation modelling was used to allow AUC to simultaneously predict purchasing considerations and foods in the home.
Online survey.ParticipantsAdult employees in south-east Alabama, USA.
DD was negatively associated with food label use and emphasis on food quality when shopping (P<0·001). In the final model, DD was associated with availability of healthful foods in the home and emphasis on food quality and grocery characteristics. About 33 % of the variance in shopping behaviours, 5 % in food label use, 7 % in availability of healthful foods and 4 % in availability of unhealthful foods was explained by DD.
Individuals with lower DD appear to be more thoughtful in making food purchasing decisions and have healthful foods available in the home more frequently than individuals with higher DD.
在购买食品时，可能会考虑食品质量、标签内容和杂货店特征等因素。家庭中食物的可得性已被证明会影响饮食行为，这也与延迟折扣（DD）有关。本研究旨在描述 DD、购买食品时的考虑因素以及家庭中食品的健康程度之间的关系。
对美国东南部的成年人（n 477）进行了横断面、在线调查，采用以下措施：DD、购物时对食品质量（营养、口味）和杂货店特征（价格、准备难易度、保质期）的考虑、食品标签的使用以及家庭中食品的可得性。DD 使用二元选择任务通过延迟折扣曲线下的面积（AUC）来评估。较大的 AUC 反映了较低的 DD。结构方程模型用于允许 AUC 同时预测购买考虑因素和家庭中的食品。
在线调查。参与者：美国阿拉巴马州东南部的成年员工。
DD 与购物时使用食品标签和强调食品质量呈负相关（P<0·001）。在最终模型中，DD 与家庭中健康食品的可得性以及对食品质量和杂货店特征的重视有关。购物行为的 33%、食品标签使用的 5%、健康食品的 7%和不健康食品的 4%的方差可由 DD 来解释。
DD 较低的个体在做出购买食品的决策时似乎更有想法，并且家庭中更经常有健康的食品。
