OBJECTIVE: To assess the effects of a 50% discount on low-energy density (ED) fruits and vegetables (F&V), bottled water, and diet sodas on shoppers' purchasing, food intake, and body weight. DESIGN AND METHODS: A randomized, controlled trial was conducted at two Manhattan supermarkets, in which a 4-week baseline period (no discounts) preceded an 8-week intervention period (50% discount), and a 4-week follow-up period (no discounts). Twenty-four hour dietary recall, as well as body weight and body composition measures were obtained every 4 weeks. Participants (n = 47, 33f; 14m) were overweight and obese (BMI ≥ 25) shoppers. RESULTS: Purchasing of F&V during intervention was greater in the discount group than in the control group (P < 0.0001). Purchasing of these items by the discount group relative to the control group during follow-up was reduced from intervention (P = 0.002), but still remained higher than during baseline (P = 0.01), indicating a partially sustained effect. Intake of F&V increased from baseline to intervention in the discount group relative to the control group (P = 0.037) and was sustained during follow-up. Body weight change did not differ significantly between groups, although post hoc analysis indicated a change within the discount group (-1.1 kg, P = 0.006) but not within the control group. CONCLUSIONS: Discounts of low-ED F&V led to increased purchasing and intake of those foods.
RCT Entities:
OBJECTIVE: To assess the effects of a 50% discount on low-energy density (ED) fruits and vegetables (F&V), bottled water, and diet sodas on shoppers' purchasing, food intake, and body weight. DESIGN AND METHODS: A randomized, controlled trial was conducted at two Manhattan supermarkets, in which a 4-week baseline period (no discounts) preceded an 8-week intervention period (50% discount), and a 4-week follow-up period (no discounts). Twenty-four hour dietary recall, as well as body weight and body composition measures were obtained every 4 weeks. Participants (n = 47, 33f; 14m) were overweight and obese (BMI ≥ 25) shoppers. RESULTS: Purchasing of F&V during intervention was greater in the discount group than in the control group (P < 0.0001). Purchasing of these items by the discount group relative to the control group during follow-up was reduced from intervention (P = 0.002), but still remained higher than during baseline (P = 0.01), indicating a partially sustained effect. Intake of F&V increased from baseline to intervention in the discount group relative to the control group (P = 0.037) and was sustained during follow-up. Body weight change did not differ significantly between groups, although post hoc analysis indicated a change within the discount group (-1.1 kg, P = 0.006) but not within the control group. CONCLUSIONS: Discounts of low-ED F&V led to increased purchasing and intake of those foods.
Authors: Peter von Philipsborn; Jan M Stratil; Jacob Burns; Laura K Busert; Lisa M Pfadenhauer; Stephanie Polus; Christina Holzapfel; Hans Hauner; Eva Rehfuess Journal: Cochrane Database Syst Rev Date: 2019-06-12
Authors: Dana Lee Olstad; Kylie Ball; Gavin Abbott; Sarah A McNaughton; Ha N D Le; Cliona Ni Mhurchu; Christina Pollard; David A Crawford Journal: Int J Behav Nutr Phys Act Date: 2016-02-24 Impact factor: 6.457
Authors: A Gopalan; J Paramanund; P A Shaw; D Patel; J Friedman; C Brophy; A M Buttenheim; A B Troxel; D A Asch; K G Volpp Journal: BMJ Open Date: 2016-11-30 Impact factor: 2.692