J Acad Nutr Diet. 2019 Jan;119(1):57-68. doi: 10.1016/j.jand.2018.04.010. Epub 2018 Jun 23.
Mobile markets are an increasingly popular method for providing access to fresh fruits and vegetables (F/V) in underserved communities; however, evaluation of these programs is limited, as are descriptions of their development, study designs, and needs of the populations they serve.
Our aim was to describe the development and theoretical basis for Veggie Van (VV), a mobile produce market intervention, the study design for the VV evaluation, and baseline characteristics of the study population.
The protocol and sample for a cluster-randomized controlled trial with 12 sites are described.
PARTICIPANTS/SETTING: Community partner organizations in the Triangle region of North Carolina that primarily served lower-income families or were located in areas that had limited access to fresh produce were recruited. Eligible individuals at each site (older than 18 years of age, self-identified as the main shoppers for their household, and expressed interest in using a mobile market) were targeted for enrollment. A total of 201 participants at 12 sites participated in the VV program and evaluation, which was implemented from November 2013 to March 2016.
Change in F/V intake (cups/day), derived from self-reported responses to the National Cancer Institute F/V screener, was the main outcome measure.
We performed a descriptive analysis of baseline sample characteristics.
Mean reported F/V intake was 3.4 cups/day. Participants reported generally having some access to fresh F/V, and 57.7% agreed they could afford enough F/V to feed their family. The most frequently cited barriers were cost (55.7%) and time to prepare F/V (20.4%). Self-efficacy was lowest for buying more F/V than usual and trying new vegetables.
By addressing cost and convenience and building skills for purchasing and preparing F/V, the VV has the potential to improve F/V consumption in underserved communities.
流动市场是为服务不足社区提供新鲜水果和蔬菜（F/V）的一种越来越受欢迎的方法；然而，这些项目的评估有限，对其发展、研究设计以及服务人群的需求的描述也有限。
我们旨在描述 Veggie Van（VV）的发展和理论基础，Veggie Van 是一种流动农产品市场干预措施，描述了 VV 评估的研究设计以及研究人群的基线特征。
描述了一项具有 12 个地点的集群随机对照试验的方案和样本。
参与者/设置：在北卡罗来纳州三角地区招募了社区合作伙伴组织，这些组织主要为低收入家庭服务，或者位于新鲜农产品供应有限的地区。每个地点的合格个人（年龄在 18 岁以上，自我认定为家庭的主要购物者，并表示有兴趣使用流动市场）都被纳入研究对象。共有 201 名参与者在 12 个地点参加了 2013 年 11 月至 2016 年 3 月实施的 VV 计划和评估。
主要结果测量是从国家癌症研究所 F/V 筛选器的自我报告反应中得出的 F/V 摄入量（杯/天）的变化。
我们对基线样本特征进行了描述性分析。
报告的平均 F/V 摄入量为 3.4 杯/天。参与者普遍表示他们有一定的新鲜 F/V 供应渠道，57.7%的参与者表示他们有能力购买足够的 F/V 来养活家人。最常提到的障碍是成本（55.7%）和准备 F/V 的时间（20.4%）。购买比平时更多的 F/V 和尝试新蔬菜的自我效能感最低。
通过解决成本和便利性问题，并培养购买和准备 F/V 的技能，VV 有可能改善服务不足社区的 F/V 消费。
