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
© 2015 American Society for Nutrition. 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 ef...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
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American Society for Nutrition
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/74520 |
| _version_ | 1848763297770242048 |
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| author | Ball, K. McNaughton, S. Le, H. Gold, L. Ni Mhurchu, C. Abbott, G. Pollard, Christina Crawford, D. |
| author_facet | Ball, K. McNaughton, S. Le, H. Gold, L. Ni Mhurchu, C. Abbott, G. Pollard, Christina Crawford, D. |
| author_sort | Ball, K. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2015 American Society for Nutrition. 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 pricereduction 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. |
| first_indexed | 2025-11-14T11:01:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-74520 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:01:14Z |
| publishDate | 2015 |
| publisher | American Society for Nutrition |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-745202019-02-19T05:36:19Z 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, K. McNaughton, S. Le, H. Gold, L. Ni Mhurchu, C. Abbott, G. Pollard, Christina Crawford, D. © 2015 American Society for Nutrition. 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 pricereduction 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. 2015 Journal Article http://hdl.handle.net/20.500.11937/74520 10.3945/ajcn.114.096735 American Society for Nutrition restricted |
| spellingShingle | Ball, K. McNaughton, S. Le, H. Gold, L. Ni Mhurchu, C. Abbott, G. Pollard, Christina Crawford, D. 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 |
| 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| url | http://hdl.handle.net/20.500.11937/74520 |