Prominent positioning and food swaps are effective interventions to reduce the saturated fat content of the shopping basket in an experimental online supermarket: a randomized controlled trial
Prominent positioning and food swaps are effective interventions to reduce the saturated fat content of the shopping basket in an experimental online supermarket: a randomized controlled trial
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DOI：
10.1186/s12966-019-0810-9
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发表时间：
2019-06-07
影响因子：
8.7
通讯作者：
Piernas, Carmen
中科院分区：
文献类型：
--
作者：
Koutoukidis, Dimitrios A.;Jebb, Susan A.;Piernas, Carmen
背景减少购买食物中饱和脂肪（SFA）含量的干预措施可能有助于减少SFA的消耗和降低心血管风险。这个析因随机对照试验的目的是研究改变默认顺序的食品和提供交换的SFA内容的食品选择在网上shopping experiments.MethodsUK成年人谁是主要的杂货店购物者为他们的家庭在网上招募，并邀请选择项目在一个定制的实验网上超市使用10个项目的购物清单。参与者被随机分配到四组之一：（i）查看类别中按SFA含量升序排列的产品，（ii）收到交换到SFA较少的产品的提议，（iii）两种干预措施的组合，或（iv）没有干预。主要结果是四组中任何一组之间购物篮中SFA能量百分比的差异。结果评估员和统计学家对干预分配不知情。ResultsBetween March and July 2018，1240名参与者均匀随机分配，1088名完成任务的人进行了分析（88%）。65%的参与者为女性，年龄为38岁（SD 12）。与无干预组（n=275）相比，其中SFA的能量百分比为25.7%（SD 5.6%），改变食物顺序（n=261）使SFA降低了[平均差异（95%CI）] -5.0%（-6.3至-3.6），提供互换（n=279）降低了-2.0%（-3.3至-0.6）。联合干预（n=273）比单独交换显著更有效（-3.4%（-4.7至-2.1）），但与单独更改顺序没有区别（-0.4%（-1.8至0.9）），P=结论改变默认顺序，以SFA的升序显示食物，并提供与较低SFA的交换，以减少SFA中的能量百分比。实验网上超市环境层面的干预，如改变默认订单，可能是一个更有前途的方式来改善粮食购买比个人层面的，如提供掉期。试验注册ISRCTN 13729526 10.1186/ISRCTN 13729526 2018年2月26日。
BackgroundInterventions to reduce the saturated fat (SFA) content of food purchases may help reduce SFA consumption and lower cardiovascular risk. This factorial RCT aimed to examine the effect of altering the default order of foods and being offered a swap on the SFA content of food selected during an online shopping experiment.MethodsUK adults who were the primary grocery shoppers for their household were recruited online and invited to select items in a custom-made experimental online supermarket using a 10-item shopping list. Participants were randomly allocated to one of four groups (i) to see products within a category ranked in ascending order of SFA content, (ii) receive an offer to swap to a product with less SFA, (iii) a combination of both interventions, or (iv) no intervention. The primary outcome was the difference in percentage energy from SFA in the shopping basket between any of the four groups. The outcome assessors and statistician were blinded to intervention allocation.ResultsBetween March and July 2018, 1240 participants were evenly randomised and 1088 who completed the task were analysed (88%). Participants were 65% female and aged 38y (SD 12). Compared with no intervention (n=275) where the percentage energy from SFA was 25.7% (SD 5.6%), altering the order of foods (n=261) reduced SFA by [mean difference (95%CI)] -5.0% (-6.3 to -3.6) and offering swaps (n=279) by -2.0% (-3.3 to -0.6). The combined intervention (n=273) was significantly more effective than swaps alone (-3.4% (-4.7 to -2.1)) but not different than altering the order alone (-0.4% (-1.8 to 0.9)), p=0.04 for interaction.ConclusionsAltering the default order to show foods in ascending order of SFA and offering a swap with lower SFA reduced percentage energy from SFA in an experimental online supermarket. Environmental-level interventions, such as altering the default order, may be a more promising way to improve food purchasing than individual-level ones, such as offering swaps.Trial registrationISRCTN13729526 10.1186/ISRCTN13729526 26th February 2018.