Multi-level supermarket discounts of fruits and vegetables on intake and health

蔬果多级超市折扣 摄入健康

• 批准号: 9038006
• 负责人: ALLAN GELIEBTER
• 金额: $ 71.01万
• 依托单位: ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
• 依托单位国家: 美国
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9038006
• 关键词: American; Ascorbic Acid; Behavior; Biological Markers; Blood Pressure; Body Composition; Body Weight; Body fat; Carotenoids; Cholesterol; Chronic Disease; Communities; Consumption; Control Groups; Coronary heart disease; Coupled; Data; Diet; Dietary intake; Eating; Economics; Energy Intake; Fatty acid glycerol esters; Food; Food Processing; Future; Goals; Government; Government Subsidy; Guidelines; Health; Health Food; Health Policy; Household; Income; Individual; Intake; Intervention; Lead; Low income; Measures; Metabolic; Metabolic syndrome; Obesity; Outcome; Outcome Measure; Overweight; Participant; Plasma; Policies; Price; Private Sector; Process; Public Sector; Publishing; Randomized; Randomized Controlled Trials; Recommendation; Recruitment Activity; Risk; Risk Factors; Scanning; Societies; Supermarket; Testing; Weight; behavioral health; cardiometabolic risk; consumer demand; cost; discount; discounting; falls; fasting glucose; follow-up; fruits and vegetables; hypertensive heart disease; improved; primary outcome; public health relevance; secondary outcome; trend; waist circumference

 DESCRIPTION (provided by applicant): The relative price of fruits and vegetables (F&V) is high, making purchasing of these healthy foods an economic hardship for many shoppers. Government subsidies coupled with public-sector and private-sector initiatives to incentivize the purchasing of F&V have recently been proposed. It would be difficult, however, to determine a reasonable and appropriate pricing of F&V, without first experimentally assessing the impact of price reduction on consumer demand, consumption, and profitability. The proposed study examines the main and sustained effects of 50%, 25%, and 12.5% discounts, versus 0% discount, on purchasing of F&V by overweight and obese (25 < BMI ≤ 40) shoppers in six stores of a Manhattan supermarket chain. Recruitment will be for 400 shoppers from within these stores to obtain an estimated 300 completers. After a 4-week baseline period (no discounts), participants will be randomly assigned to receive a 50%, 25%, 12.5%, or 0% discount during a 32-week intervention period, with a 16-week follow-up period (no discounts). The discounts will be automatically activated after 4 weeks through the participant's loyalty scan card, which will also track all purchases. The primary aims are to measure the effects of the four discount levels on purchasing and consumption of F&V during the intervention period and the health outcomes at the end of the intervention period. Additionally, a primary aim is to measure the sustained effects of the discounts on these outcomes during the follow-up period. It is expected that the larger the discount on F&V, the greater the increase in purchasing and consumption of F&V, especially for those with relatively low incomes. These increases in F&V purchasing and consumption are expected to lead to improved health outcomes, such as weight and fat loss as well as reduced cardio metabolic risk factors. Demand curves for purchasing and consumption of F&V will be drawn for all the discount levels to help select optimal discount levels. The study findings should help to inform government policymakers on the appropriate subsidies to consider for promoting healthy food choices.

 描述（由申请人提供）：水果和蔬菜（F&V）的相对价格较高，使得购买这些健康食品成为许多购物者的经济困难。最近提出了政府补贴以及公共部门和私营部门激励食品和饮料购买的举措。然而，如果不首先通过实验评估降价对消费者需求、消费和盈利能力的影响，就很难确定合理、适当的食品和饮料定价。拟议的研究考察了曼哈顿连锁超市六家商店中超重和肥胖 (25 < BMI ≤ 40) 购物者购买 F&V 时 50%、25% 和 12.5% 折扣与 0% 折扣的主要和持续影响。将从这些商店内招募 400 名购物者，以获得估计 300 名完成者。 4 周基线期（无折扣）后，参与者将被随机分配在 32 周干预期内接受 50%、25%、12.5% 或 0% 折扣，并有 16 周随访期（无折扣）。折扣将在 4 周后通过参与者的忠诚度扫描卡自动激活，该卡还将跟踪所有购买情况。主要目的是衡量干预期间四个折扣水平对食品和饮料购买和消费的影响以及干预期结束时的健康结果。此外，主要目的是衡量后续期间折扣对这些结果的持续影响。预计食品和饮料的折扣越大，食品和饮料的购买和消费增幅就越大，特别是对于收入相对较低的人来说。食品和饮料购买和消费的增加预计将改善健康状况，例如减轻体重和脂肪以及减少心脏代谢风险因素。将为所有折扣级别绘制食品和饮料的购买和消费需求曲线，以帮助选择最佳折扣级别。研究结果应有助于告知政府政策制定者应考虑采取适当的补贴来促进健康食品的选择。