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

蔬果多级超市折扣摄入健康

基本信息

批准号：
9559702
负责人：
ALLAN GELIEBTER
金额：
$ 69.94万
依托单位：
ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
依托单位国家：
美国
项目类别：
财政年份：
2016
资助国家：
美国
起止时间：
2016-09-01 至 2022-02-28
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/9559702
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 Future Goals Government Government Subsidy Health Health Food Health Policy Household Hypertension Incentives 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 Risk Risk Factors Scanning Societies Supermarket Testing Weight behavioral health consumer demand cost dietary guidelines discount discounting falls fasting glucose follow-up fruits and vegetables improved primary outcome public health relevance recruit secondary outcome trend waist circumference

项目摘要

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，加上公共部门和私营部门鼓励购买的举措。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 F&V 的合理且适当的定价。曼哈顿连锁超市 6 家门店的超重和肥胖 (25 < BMI ≤ 40) 购物者购买 F&V 时享受 50%、25% 和 12.5% 折扣（与 0% 折扣相比）的效果将针对 400 名。这些商店内的购物者将获得估计 300 名完成者在 4 周基准期（无折扣）后，参与者将被随机分配获得 50%， 32 周干预期内 25%、12.5% 或 0% 折扣，后续 16 周（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。还跟踪所有购买情况。主要目的是衡量干预期间四种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。后续期间折扣对这些结果的影响预计，食品和饮料的折扣越大，食品和饮料的购买和消费的增加就越大，特别是对于收入相对较低的人来说。预计消费将改善健康结果，例如体重和脂肪减少以及心脏代谢风险因素的减少。该研究将为所有折扣水平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水平。调查结果应有助于告知政府政策制定者考虑提供适当补贴以促进健康食品选择。