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Influence of price discounts and skill-building strategies on purchase and consumption of healthy food and beverages: outcomes of the Supermarket Healthy Eating for Life randomized controlled trial

Ball, Kylie, McNaughton, Sarah A., Le, Ha N. D., Gold, Lisa, Ni Mhurchu, Cliona, Abbott, Gavin, Pollard, Christina and Crawford, David 2015, Influence of price discounts and skill-building strategies on purchase and consumption of healthy food and beverages: outcomes of the Supermarket Healthy Eating for Life randomized controlled trial, American journal of clinical nutrition, vol. 101, no. 5, pp. 1055-1064, doi: 10.3945/ajcn.114.096735.

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Title Influence of price discounts and skill-building strategies on purchase and consumption of healthy food and beverages: outcomes of the Supermarket Healthy Eating for Life randomized controlled trial
Author(s) Ball, KylieORCID iD for Ball, Kylie orcid.org/0000-0003-2893-8415
McNaughton, Sarah A.ORCID iD for McNaughton, Sarah A. orcid.org/0000-0001-5936-9820
Le, Ha N. D.ORCID iD for Le, Ha N. D. orcid.org/0000-0001-8279-8324
Gold, LisaORCID iD for Gold, Lisa orcid.org/0000-0002-2733-900X
Ni Mhurchu, Cliona
Abbott, GavinORCID iD for Abbott, Gavin orcid.org/0000-0003-4014-0705
Pollard, Christina
Crawford, DavidORCID iD for Crawford, David orcid.org/0000-0002-2467-7556
Journal name American journal of clinical nutrition
Volume number 101
Issue number 5
Start page 1055
End page 1064
Total pages 10
Publisher American Society for Nutrition
Place of publication Bethesda, Md.
Publication date 2015-05
ISSN 1938-3207
Keyword(s) behavior change
fruit and vegetables
price discounts
randomized controlled trial
skills
Science & Technology
Life Sciences & Biomedicine
Nutrition & Dietetics
CORONARY-HEART-DISEASE
OF-THE-LITERATURE
VEGETABLE CONSUMPTION
NUTRITION EDUCATION
BODY-WEIGHT
FRUIT
POPULATION
ADULTS
INTERVENTIONS
METAANALYSIS
Summary BACKGROUND: Fiscal strategies are increasingly considered upstream nutrition promotion measures. However, few trials have investigated the effectiveness or cost effectiveness of pricing manipulations on diet in real-world settings. OBJECTIVE: We assessed the effects on fruit, vegetable, and beverage purchasing and consumption of a 20% price-reduction intervention, a tailored skills-based behavior-change intervention, and a combined intervention compared with a control condition. DESIGN: The Supermarket Healthy Eating for Life trial was a randomized controlled trial conducted over 3 mo [baseline (time 1) to postintervention (time 2) with a 6-mo follow-up (time 3)]. Female primary household shoppers in Melbourne, Australia, were randomly assigned to a 1) skill-building (n = 160), 2) price-reduction (n = 161), 3) combined skill-building and price-reduction (n = 160), or 4) control (n = 161) group. Supermarket transaction data and surveys were used to measure the following study outcomes: fruit, vegetable, and beverage purchases and self-reported fruit and vegetable consumption at each time point. RESULTS: At 3 mo (time 2), price reduction-alone participants purchased more total vegetables and frozen vegetables than did controls. Price reduction-alone and price reduction-plus-skill-building participants purchased more fruit than did controls. Relative to controls, in the price-reduction group, total vegetable consumption increased by 233 g/wk (3.1 servings or 15% more than at baseline), and fruit purchases increased by 364 g/wk (2.4 servings; 35% more than at baseline). Increases were not maintained 6 mo postintervention (time 3). Price reduction-alone participants showed a tendency for a slight increase in fruit consumption at time 2 (P = 0.09) that was maintained at time 3 (P = 0.014). No intervention improved purchases of bottled water or low-calorie beverages. CONCLUSIONS: A 20% price reduction in fruit and vegetables resulted in increased purchasing per household of 35% for fruit and 15% for vegetables over the price-reduction period. These findings show that price modifications can directly increase produce purchases. The Supermarket Healthy Eating for Life trial was registered at Current Controlled Trials Registration as ISRCTN39432901.
Language eng
DOI 10.3945/ajcn.114.096735
Field of Research 111199 Nutrition and Dietetics not elsewhere classified
Socio Economic Objective 920411 Nutrition
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, American Society for Nutrition
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30072654

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.