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The El Valor de Nuestra Salud clustered randomized controlled trial store-based intervention to promote fruit and vegetable purchasing and consumption

Authors :
Guadalupe X. Ayala
Julie L. Pickrel
Barbara Baquero
Jennifer Sanchez-Flack
Shih-Fan Lin
George Belch
Cheryl L. Rock
Laura Linnan
Joel Gittelsohn
Ming Ji
John P. Elder
Joni Mayer
Source :
International Journal of Behavioral Nutrition and Physical Activity, Vol 19, Iss 1, Pp 1-17 (2022)
Publication Year :
2022
Publisher :
BMC, 2022.

Abstract

Abstract Background Modifying the environment to promote healthy foods is a population-based approach for improving diet. This study evaluated the outcome effectiveness of a food store intervention that used structural and social change strategies to promote fruits and vegetables. It was hypothesized that intervention versus control store customers would improve their consumption of fruits and vegetables at 6 months. Trial design Clustered randomized controlled trial Methods Sixteen pair-matched stores were randomized to an intervention or wait-list control condition. With the research team’s support, intervention stores modified the availability, accessibility, and promotion of fruits and vegetables, including augmenting produce displays within the store and building employees’ capacity to place and promote fruits and vegetables throughout the store (Phase 1), followed by the delivery of a customer-directed marketing campaign for 6 months (Phase 2). From months 7 to 12, stores were encouraged to maintain strategies on their own (Phase 3). Customer-reported daily fruit and vegetable consumption (cups/day) were collected by blinded research assistants at three time-points (baseline, 6 months and 12 months post-baseline) from 369 participating customers (an average of 23/store). Secondary outcomes included customer-reported fruit and vegetable purchasing and other behaviors. Results The study retained the 16 stores and most customers at 6 (91%) and 12 (89%) months. Although significant differences were not observed in the overall sample for vegetable consumption, male customers of intervention versus control stores consumed significantly more fruit daily at 6 months [mean (standard deviation) cups at baseline and six months; intervention: 1.6 (1.5) to 1.6 (1.5) vs. control: 1.4 (1.2) to 1.1 (0.8)]. However, this difference was not observed at 12 months, or among females. There was an overall increase in dollars spent at the targeted store in the intervention versus control condition among male versus female customers at 6 months; however, no change was observed in the percent of dollars spent on fruits and vegetables at the targeted store. Frequency of shopping at the targeted store did not modify intervention effects. Conclusions Structural and social change interventions can modify customers’ behavior in the short-term. Future research should consider methods for achieving longer-term changes, and potential generalizability to other products (e.g., energy-dense sweet and savory products). Trial registration NCT01475526

Details

Language :
English
ISSN :
14795868
Volume :
19
Issue :
1
Database :
Directory of Open Access Journals
Journal :
International Journal of Behavioral Nutrition and Physical Activity
Publication Type :
Academic Journal
Accession number :
edsdoj.35aaafaf1adc481a9d15f3115b186bee
Document Type :
article
Full Text :
https://doi.org/10.1186/s12966-021-01220-w