| Author |
Ball, Kylie McNaughton, Sarah A. Le, Ha N. D. Gold, Lisa Ni Mhurchu, Cliona Abbott, Gavin Pollard, Christina Crawford, David |
| Description |
Author Affiliation: Ball K ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia); McNaughton SA ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia); Le HN ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia); Gold L ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia); Ni Mhurchu C ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia); Abbott G ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia); Pollard C ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia); Crawford D ( From the Centre for Physical Activity and Nutrition Research (KB, SAM, GA, and DC) and Deakin Health Economics (HNDL and LG), Deakin University, Burwood, Australia) |
| Abstract |
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. |
