Abstract：
The objective of this study was to assess purchasing, intake, and weight after discounting fruits and vegetables (F&V) and noncaloric beverages in New York City supermarkets.
A 16-week randomized controlled trial was conducted with a 4-week baseline, an 8-week intervention with 50% discounts on F&V and noncaloric beverages, and a 4-week follow-up. Purchasing was tracked via loyalty cards, and intake was tracked via 24-h dietary recalls. Weights were measured at five in-person visits.
Data from 67 participants were analyzed (38 in the experimental group; 29 in the control group). F&V and noncaloric beverage weekly purchasing was greater in the experimental than the control group (mean difference [SD], $4.64 [$1.44], p < 0.0001; $0.53 [$0.39], p = 0.008) during intervention, with F&V purchasing remaining greater in the experimental versus control group during follow-up (p = 0.005). F&V intake was greater for the experimental than the control group during intervention (142 [105] g/day; p = 0.009) and follow-up (p = 0.001). Although no difference in noncaloric beverage consumption was observed between groups, there was lower alcohol intake in the experimental than the control group during follow-up (-85.8 [60.2] g/day; p = 0.004). The experimental group lost weight compared with the control group (-1.33 [0.92] kg; p = 0.006 intervention and p = 0.106 follow-up). No differences in nutrient composition or high energy-dense product consumption were found.
A 50% discount on F&V and noncaloric beverages promoted increased purchasing and intake of F&V and induced weight loss.
A 16-week randomized controlled trial was conducted with a 4-week baseline, an 8-week intervention with 50% discounts on F&V and noncaloric beverages, and a 4-week follow-up. Purchasing was tracked via loyalty cards, and intake was tracked via 24-h dietary recalls. Weights were measured at five in-person visits.
Data from 67 participants were analyzed (38 in the experimental group; 29 in the control group). F&V and noncaloric beverage weekly purchasing was greater in the experimental than the control group (mean difference [SD], $4.64 [$1.44], p < 0.0001; $0.53 [$0.39], p = 0.008) during intervention, with F&V purchasing remaining greater in the experimental versus control group during follow-up (p = 0.005). F&V intake was greater for the experimental than the control group during intervention (142 [105] g/day; p = 0.009) and follow-up (p = 0.001). Although no difference in noncaloric beverage consumption was observed between groups, there was lower alcohol intake in the experimental than the control group during follow-up (-85.8 [60.2] g/day; p = 0.004). The experimental group lost weight compared with the control group (-1.33 [0.92] kg; p = 0.006 intervention and p = 0.106 follow-up). No differences in nutrient composition or high energy-dense product consumption were found.
A 50% discount on F&V and noncaloric beverages promoted increased purchasing and intake of F&V and induced weight loss.
摘要：
目的：本研究的目的是评估采购，摄入量，在纽约市超市打折水果和蔬菜(F&V)和无热量饮料后的体重。
方法：一项为期16周的随机对照试验以4周的基线进行，为期8周的干预措施，对F&V和无热量饮料有50%的折扣，和4周的随访。购买是通过会员卡追踪的，并通过24小时饮食召回跟踪摄入量。权重是在五次亲自访问时测量的。
结果：分析了来自67名参与者的数据（实验组38名；对照组29名）。实验组每周购买F&V和无热量饮料比对照组更大(平均差[SD]，$4.64[$1.44]，p<0.0001;$0.53[$0.39]，p=0.008)在干预期间，在随访期间，实验组与对照组相比，F&V购买量保持更大(p=0.005)。在干预期间（142[105]g/天；p=0.009）和随访期间（p=0.001），实验组的F&V摄入量高于对照组。尽管两组之间的无热量饮料消费量没有差异，随访期间,实验组的酒精摄入量低于对照组(-85.8[60.2]g/天;p=0.004).与对照组相比，实验组体重减轻（-1.33[0.92]kg；p=0.006干预和p=0.106随访）。没有发现营养成分或高能量密度产品消耗的差异。
结论：对F&V和无热量饮料的50%折扣促进了F&V的购买和摄入量的增加，并导致体重减轻。
方法：一项为期16周的随机对照试验以4周的基线进行，为期8周的干预措施，对F&V和无热量饮料有50%的折扣，和4周的随访。购买是通过会员卡追踪的，并通过24小时饮食召回跟踪摄入量。权重是在五次亲自访问时测量的。
结果：分析了来自67名参与者的数据（实验组38名；对照组29名）。实验组每周购买F&V和无热量饮料比对照组更大(平均差[SD]，$4.64[$1.44]，p<0.0001;$0.53[$0.39]，p=0.008)在干预期间，在随访期间，实验组与对照组相比，F&V购买量保持更大(p=0.005)。在干预期间（142[105]g/天；p=0.009）和随访期间（p=0.001），实验组的F&V摄入量高于对照组。尽管两组之间的无热量饮料消费量没有差异，随访期间,实验组的酒精摄入量低于对照组(-85.8[60.2]g/天;p=0.004).与对照组相比，实验组体重减轻（-1.33[0.92]kg；p=0.006干预和p=0.106随访）。没有发现营养成分或高能量密度产品消耗的差异。
结论：对F&V和无热量饮料的50%折扣促进了F&V的购买和摄入量的增加，并导致体重减轻。
