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Randomized Controlled Trial
. 2017 Sep 16;14(1):127.
doi: 10.1186/s12966-017-0585-9.

Financial incentives and purchase restrictions in a food benefit program affect the types of foods and beverages purchased: results from a randomized trial

Simone A French  1 , Sarah A Rydell  2 , Nathan R Mitchell  2 , J Michael Oakes  2 , Brian Elbel  3 , Lisa Harnack  2
Affiliations
Randomized Controlled Trial

Financial incentives and purchase restrictions in a food benefit program affect the types of foods and beverages purchased: results from a randomized trial

Simone A French et al. Int J Behav Nutr Phys Act. .

Abstract

Background: This research evaluated the effects of financial incentives and purchase restrictions on food purchasing in a food benefit program for low income people.

Methods: Participants (n=279) were randomized to groups: 1) Incentive- 30% financial incentive for fruits and vegetables purchased with food benefits; 2) Restriction- no purchase of sugar-sweetened beverages, sweet baked goods, or candies with food benefits; 3) Incentive plus Restriction; or 4) Control- no incentive or restrictions. Participants received a study-specific debit card where funds were added monthly for 12-weeks. Food purchase receipts were collected over 16 weeks. Total dollars spent on grocery purchases and by targeted food categories were computed from receipts. Group differences were examined using general linear models.

Results: Weekly purchases of fruit significantly increased in the Incentive plus Restriction ($4.8) compared to the Restriction ($1.7) and Control ($2.1) groups (p <.01). Sugar-sweetened beverage purchases significantly decreased in the Incentive plus Restriction (-$0.8 per week) and Restriction ($-1.4 per week) groups compared to the Control group (+$1.5; p< .0001). Sweet baked goods purchases significantly decreased in the Restriction (-$0.70 per week) compared to the Control group (+$0.82 per week; p < .01).

Conclusions: Paired financial incentives and restrictions on foods and beverages purchased with food program funds may support more healthful food purchases compared to no incentives or restrictions.

Clinical trial registration: Clinicaltrials.gov Identifier: NCT02643576 .

Keywords: Financial incentives; Food purchases; Low income; Restrictions; SNAP (supplemental nutrition assistance program).

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Conflict of interest statement

Author information

Not Applicable.

Ethics approval and consent to participate

The University of Minnesota IRB approved the study. All participants consented to take part in the study.

Consent for publication

All authors consented to the present version of the manuscript submitted here.

Competing interests

The authors have no conflicts to report.

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Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Consort Diagram
See this image and copyright information in PMC

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