Warwick Medical School, University of Warwick, Gibbet Hill Campus, Coventry, CV4 7AL, UK.
Worcester College, University of Oxford, Oxford, OX1 2HB, UK.
BMC Public Health. 2018 Oct 1;18(1):1149. doi: 10.1186/s12889-018-6063-8.
In developed countries, adolescent and young adult diets have been found to be nutritionally poor. The aim of this study was to examine whether a choice architecture intervention, re-arrangement of produce within a grocery store to increase the accessibility of fruit and vegetables, affected purchasing behaviour on a university campus.
A database of daily sales data from January 2012 to July 2017 was obtained from a campus grocery store. Two changes to the layout were made during this time period. In January 2015, fruit and vegetables were moved from the back of the store, furthest from the entrance, to the aisle closest to the entrance and an entrance-facing display increasing their accessibility. In April 2016, the entrance-facing display of fruit and vegetables was replaced with a chiller cabinet so that fruit and vegetables remained more accessible than during the baseline period, but less accessible than in the period immediately previously. A retrospective interrupted time series analysis using dynamic regression was used to model the data and to examine the effect of the store re-arrangements on purchasing. All analyses were carried out both for sales-by-quantity and for sales-by-money.
The first shop re-arrangement which made fruit and vegetables more prominent, increased the percentage of total sales that were fruit and vegetables, when analysed by either items purchased or money spent. The second rearrangement also had a positive effect on the percentage of total sales that were fruit and vegetables compared to baseline, however this was not significant at the 5% level. Over the five year period, the percentage of sales that were fruit and vegetables declined both in terms of items purchased, and money spent.
Increasing accessibility of fruit and vegetables in a grocery store is a feasible way to improve the diet of students in tertiary education. There is evidence of declining fruit and vegetable consumption among the studied population, which should be further investigated.
在发达国家，青少年和年轻成年人的饮食被发现营养不足。本研究旨在检验一种选择架构干预措施（重新布置杂货店中的农产品以增加水果和蔬菜的可及性）是否会影响大学校园的购买行为。
从校园杂货店的 2012 年 1 月至 2017 年 7 月的销售数据库中获得了每日销售数据。在此期间，对布局进行了两次更改。2015 年 1 月，水果和蔬菜从商店的后部（离入口最远的地方）移到了靠近入口的过道上，并设置了一个面向入口的展示架，以增加其可及性。2016 年 4 月，水果和蔬菜的入口展示柜被替换为冷藏柜，使得水果和蔬菜仍然比基线时期更易接近，但不如之前的时期那么容易接近。使用动态回归进行回顾性中断时间序列分析，对数据进行建模，并检验商店重新布置对购买行为的影响。所有分析均同时针对销售量和销售额进行。
第一次重新布置使水果和蔬菜更加突出，按购买量或销售额计算，均增加了总销售额中水果和蔬菜的比例。第二次重新布置与基线相比，也对水果和蔬菜的总销售额比例产生了积极影响，但在 5%的水平上并不显著。在五年期间，无论是按购买量还是销售额计算，水果和蔬菜的销售额比例均有所下降。
增加杂货店中水果和蔬菜的可及性是改善高等教育学生饮食的可行方法。在所研究的人群中，水果和蔬菜的消费呈下降趋势，这一点应该进一步调查。
