Enhancing Long-Term 5-a-Day Behavior Change in Worksites

描述（由申请人提供）：本研究的长期目标是加强对饮食行为改变的长期维持，特别是在工作人群中维持增加的水果和蔬菜消费。本研究是一项基于最新行为理论的随机试验，旨在评估一种新的干预措施的有效性，以继续和维持增加水果和蔬菜（F&V）消费的行为，并调查与维持和支持这种行为相关的个人和工作场所过程。干预措施的目的是帮助工地采用“每日五餐”活动作为整体运作程序的一部分，以加强维持不断增加的餐饮消费。它在工作场所的社会环境、组织和个人层面上采用了最先进的行为策略，以增加水果和蔬菜消费的长期变化，并建立工作场所维持一天5次活动的能力。员工咨询委员会（EAB）的成员将接受培训，成为干预的主要工具。该项目将有助于在多个层面上确定影响行为改变的启动和维持的因素。这个项目很重要，因为只有有限数量的基于社区的干预研究在研究支持的干预结束后两年多的时间里评估了行为的维持情况，而实际上使用理论框架进行干预以维持项目活动的研究就更少了。随机对照试验包括20个目前正在进行干预的工作场所，它们将被随机分为维持干预组或对照组，以及20个目前正在进行比较的工作场所，它们将接受干预，然后也被随机分为维持干预组或对照组。工作场所是实验单位，主要结果测量是工作场所水平的水果和蔬菜供应的变化，在两个时间点使用独立的员工横断面样本进行评估：新的基线和24个月的随访。还将在员工的子样本中评估水果和蔬菜摄入量的生物标志物。水果和蔬菜对身体健康很重要，但美国人的平均摄入量仍然低于美国国家癌症研究所推荐的每天五份。工作场所是改变饮食习惯的良好渠道，可以被视为可以改变社会环境以促进健康的小社区。事实上，最初的“西雅图每天5份”工作场所计划和目前“西雅图每天5份”工作场所计划的初步结果都成功地使员工的平均每日水果和蔬菜摄入量增加了约三分之一。

DESCRIPTION (provided by applicant): The long-term goal of this research is to enhance the long- term maintenance of dietary behavior change, specifically the maintenance of increased fruit and vegetable consumption in the working population. This study is a randomized trial to evaluate the effectiveness of a new intervention, based on updated behavioral theories, to continue and maintain the behavior of increased fruit and vegetable (F&V) consumption, and to investigate the individual and worksite processes associated with sustaining and supporting that behavior. The intervention is designed to help the worksites adopt the 5 a Day activities as part of their overall operating procedures, in order to reinforce the maintenance of increased F&V consumption. It features state--of-the-art behavioral strategies at the worksite social environment, organizational and individual levels, to augment the long-term change in fruit and vegetable consumption and to build the capacity of the worksite to sustain 5 a Day activities. Members of the Employee Advisory Board (EAB) will be trained to be the main vehicle for the intervention. The project will help identify factors influencing the initiation and maintenance of behavior change at multiple levels. This project is important because only a limited number of community-based intervention studies have assessed the maintenance of behaviors more than two years after the research supported intervention has ended, and even fewer have actually intervened to sustain the program activities using a theoretical framework. The randomized controlled trial involves 20 current intervention worksites that will be randomized to maintenance intervention or control, and 20 current comparison worksites that will receive the intervention and then also be randomized to maintenance or control. The worksite is the experimental unit, and the primary outcome measure is change at the worksite level in servings of fruits and vegetables, assessed using independent cross-sectional samples of employees at two time points: the new baseline and 24-month follow-up. Biological markers of fruit and vegetable intake will also be assessed in a sub-sample of employees. Fruit and vegetables are important for good health, but the mean intake in the U.S. remains less than the five servings daily recommended by the National Cancer Institute. Worksites are good channels of dietary change and can be considered small communities where social environments can be changed to promote health. Indeed, both the original Seattle 5 a Day worksite program and preliminary results from the current Seattle 5 a Day worksite program successfully increased average daily consumption by employees of fruit and vegetables by about one third of a serving size.