A randomized trial of web-based behavioral economic interventions to promote healthy food choices among food pantry clients

项目摘要 肥胖、不健康的饮食习惯和粮食不安全是主要的公共卫生问题， 特别是对生活贫困的人。食品储藏室，为那些 越来越多的人对促进健康的选择感兴趣，但很少有严格的研究 测试了低成本的行为干预措施，以鼓励食品储藏室选择健康食品 设置.本提案的总体目标是进行1年随机对照试验 在500名普通食品储藏室客户中，比较行为经济学的影响， 通过网上订购平台提供更健康的食物选择， 常规护理（对照组）。在这个食品储藏室，客户被分配点“购买”食物和地方 他们的订单通过一个基于触摸屏的计算机订购平台。我们将实施一项 采用几种行为经济学策略的干预措施，并比较这种干预措施 食品储藏室目前的在线订购系统（常规护理对照组）。我们的行为 经济干预使用以下四种策略来促进更健康的选择：1）默认 2）健康的安置选择架构; 3）简单而突出的营养信息; （4）社会规范信息。分配到干预组的食品储藏室客户将记录 进入通常的食品订购平台，但它会预先填充他们的购物篮， 健康的首选项作为默认值（客户端可以选择删除它们）。此外，作为客户 浏览网站，一个健康的位置选择架构干预将放置 在网页的顶部为每个食物类别提供最健康的选择。第三次干预 组件将显示简单而突出的交通灯标签，以指示更多的食物， 不太健康的沿着显著消息以突出更健康食品的价格折扣（例如， “通过从白色切换到糙米来节省1.5分”）。第四次干预将显示 指示最常选择的健康产品的社会规范消息（例如，一半以上 所有顾客在这里购物时都会点香蕉）。我们将比较这两个 干预措施影响：1）从食品室选择的食物的营养质量， 交易数据; 2）通过水果和蔬菜生物标志物和食物测量的膳食摄入量 频率问卷; 3）客观测量体重、血压和HbA 1c 程度. !

PROJECT SUMMARY Obesity, unhealthy dietary habits, and food insecurity are major public health concerns, especially affecting individuals living in poverty. Food pantries, which provide free food to those in need, are increasingly interested in promoting healthy choices, but few rigorous studies have tested low-cost, behavioral interventions to encourage healthy food choices in food pantry settings. The overall objective of this proposal is to conduct a 1-year randomized-controlled trial among 500 regular food pantry clients to compare the influence of a behavioral economic intervention to promote healthier food choices delivered via a web-based ordering platform to usual care (control group). At this pantry, clients are assigned points to “buy” food and place their orders via a touchscreen-based computer ordering platform. We will implement an intervention that employs several behavioral economic strategies and compare this intervention to the food pantry’s current online ordering system (usual care control group). Our behavioral economic intervention uses the following four strategies to promote healthier choices: 1) default settings; 2) healthy placement choice architecture; 3) simple and salient nutrition messaging; and 4) social norms messaging. Food pantry clients assigned to the intervention group will log into the usual food ordering platform, but it will pre-populate their shopping basket with several healthy, preferred items as the default (clients can opt to remove them). In addition, as clients navigate the website, a healthy placement choice architecture intervention will place the healthiest options at the top of the webpage for each food category. The third intervention component will display simple and salient traffic light labels to indicate foods that are more and less healthy along with salient messaging to highlight price discounts on healthier foods (e.g., “save 1.5 points by switching from white to brown rice”). The fourth intervention will display social norms messaging indicating the most commonly selected healthy products (e.g., over half of all customers order bananas when shopping here). We will compare how these two interventions influence: 1) the nutritional quality of food selected from the pantry based on transaction data; 2) dietary intake measured by fruit and vegetable biomarkers and food frequency questionnaires; and 3) objectively measured weight, blood pressure, and HbA1c levels. !