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Evaluating the effect of individually-targeted food incentives on grocery purchases: The smart cart study protocol for a randomized controlled cross-over trial.
Contemp Clin Trials. 2020 04; 91:105966.CC

Abstract

BACKGROUND/AIMS

Health stakeholders are interested in the promise of healthy food incentives to improve dietary quality. The Smart Cart Study tested whether targeting healthful food incentives based on customer preferences and purchase history was effective for improving grocery purchase quality.

DESIGN

Randomized controlled crossover design of 224 adults who shopped at an independent supermarket for ≥50% of their groceries, participated in the store's loyalty program, and completed validated diet and sociodemographic/behavioral questionnaires. Participants were randomized using 1:1 blocked randomization; all participants received a 5% discount on their purchases with their loyalty card. For the first 13-weeks, the intervention group received individually-targeted weekly coupons (valued up to $10) with brief nutrition education to improve grocery purchase quality. The study team developed healthy food coupons, and the study algorithm allocated targeted coupons to participants' loyalty cards using purchase history, dietary preferences/allergies, and baseline diet quality. Control participants received weekly untargeted nutrition education and occasional generic coupons. Following a 2-4 week washout period, the two groups crossed over. The primary study outcomes were purchases of targeted products and grocery purchase quality measured using the validated Grocery Purchase Quality Index-2016; the study was powered to detect a minimum 3% difference in purchase quality.

CONCLUSIONS

The Smart Cart Study tested a novel application of automated individually-targeted marketing using customer purchase history, dietary quality, and preferences to identify and deliver targeted incentives to improve grocery purchase quality. Future research could scale this program through collaboration between multiple stakeholders, including supermarkets, workplace wellness initiatives and insurance companies.

Authors+Show Affiliations

Department of Nutrition and Food Sciences, College of Health Sciences, University of Rhode Island, Kingston, RI, United States of America. Electronic address: Maya_vadiveloo@uri.edu.Marketing Area, College of Business Administration, University of Rhode Island, Kingston, RI, United States of America.Department of Nutrition and Food Sciences, College of Health Sciences, University of Rhode Island, Kingston, RI, United States of America.AgroParis Tech., 75231 Paris, Ile-de-France, France.Department of Pharmacy Practice, College of Pharmacy, University of Rhode Island, Kingston, RI, United States of America.Marketing Area, College of Business Administration, University of Rhode Island, Kingston, RI, United States of America.General Internal Medicine Division, Department of Medicine, Massachusetts General Hospital, Boston, MA, United States of America; Harvard Medical School, Boston, MA, United States of America.

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

32092439

Citation

Vadiveloo, Maya K., et al. "Evaluating the Effect of Individually-targeted Food Incentives On Grocery Purchases: the Smart Cart Study Protocol for a Randomized Controlled Cross-over Trial." Contemporary Clinical Trials, vol. 91, 2020, p. 105966.
Vadiveloo MK, Guan X, Parker HW, et al. Evaluating the effect of individually-targeted food incentives on grocery purchases: The smart cart study protocol for a randomized controlled cross-over trial. Contemp Clin Trials. 2020;91:105966.
Vadiveloo, M. K., Guan, X., Parker, H. W., Perraud, E., Buchanan, A., Atlas, S., & Thorndike, A. N. (2020). Evaluating the effect of individually-targeted food incentives on grocery purchases: The smart cart study protocol for a randomized controlled cross-over trial. Contemporary Clinical Trials, 91, 105966. https://doi.org/10.1016/j.cct.2020.105966
Vadiveloo MK, et al. Evaluating the Effect of Individually-targeted Food Incentives On Grocery Purchases: the Smart Cart Study Protocol for a Randomized Controlled Cross-over Trial. Contemp Clin Trials. 2020;91:105966. PubMed PMID: 32092439.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluating the effect of individually-targeted food incentives on grocery purchases: The smart cart study protocol for a randomized controlled cross-over trial. AU - Vadiveloo,Maya K, AU - Guan,Xintong, AU - Parker,Haley W, AU - Perraud,Elie, AU - Buchanan,Ashley, AU - Atlas,Stephen, AU - Thorndike,Anne N, Y1 - 2020/02/21/ PY - 2019/10/02/received PY - 2020/02/13/revised PY - 2020/02/19/accepted PY - 2020/2/25/pubmed PY - 2021/8/5/medline PY - 2020/2/25/entrez KW - Automated KW - Clinical trial design KW - Crossover trial KW - Diet quality KW - Grocery purchase quality KW - Smart cart KW - Targeted incentives SP - 105966 EP - 105966 JF - Contemporary clinical trials JO - Contemp Clin Trials VL - 91 N2 - BACKGROUND/AIMS: Health stakeholders are interested in the promise of healthy food incentives to improve dietary quality. The Smart Cart Study tested whether targeting healthful food incentives based on customer preferences and purchase history was effective for improving grocery purchase quality. DESIGN: Randomized controlled crossover design of 224 adults who shopped at an independent supermarket for ≥50% of their groceries, participated in the store's loyalty program, and completed validated diet and sociodemographic/behavioral questionnaires. Participants were randomized using 1:1 blocked randomization; all participants received a 5% discount on their purchases with their loyalty card. For the first 13-weeks, the intervention group received individually-targeted weekly coupons (valued up to $10) with brief nutrition education to improve grocery purchase quality. The study team developed healthy food coupons, and the study algorithm allocated targeted coupons to participants' loyalty cards using purchase history, dietary preferences/allergies, and baseline diet quality. Control participants received weekly untargeted nutrition education and occasional generic coupons. Following a 2-4 week washout period, the two groups crossed over. The primary study outcomes were purchases of targeted products and grocery purchase quality measured using the validated Grocery Purchase Quality Index-2016; the study was powered to detect a minimum 3% difference in purchase quality. CONCLUSIONS: The Smart Cart Study tested a novel application of automated individually-targeted marketing using customer purchase history, dietary quality, and preferences to identify and deliver targeted incentives to improve grocery purchase quality. Future research could scale this program through collaboration between multiple stakeholders, including supermarkets, workplace wellness initiatives and insurance companies. SN - 1559-2030 UR - https://www.unboundmedicine.com/medline/citation/32092439/Evaluating_the_effect_of_individually_targeted_food_incentives_on_grocery_purchases:_The_smart_cart_study_protocol_for_a_randomized_controlled_cross_over_trial_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1551-7144(20)30044-6 DB - PRIME DP - Unbound Medicine ER -