Email-Based Diet & Activity Promotion in Worksites

基于电子邮件的饮食

• 批准号: 6952865
• 负责人: BARBARA STERNFELD
• 金额: $ 36.45万
• 依托单位: KAISER FOUNDATION RESEARCH INSTITUTE
• 依托单位国家: 美国
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-30 至 2007-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6952865
• 关键词: Internet; absenteeism; behavioral /social science research tag; body physical activity; clinical research; clinical trials; computer assisted instruction; computer data analysis; counseling; diet; disease /disorder prevention /control; education evaluation /planning; exercise; health behavior; health care service utilization; health education; health service demonstration project; health services research tag; human subject; human therapy evaluation; nutrition education; nutrition related tag; obesity; occupational health /safety; overeating; quality of life; statistics /biometry; work site

DESCRIPTION (provided by applicant): Approximately 400,000 deaths in the United States each year are attributable to poor diet and physical inactivity. Despite the well-documented health benefits of regular physical activity and diets high in fruits and vegetables and low in fat, the prevalence of these behaviors remains relatively low in the population as a whole, and even lower in minority and socioeconomically disadvantaged subgroups. The overall purpose of this proposal is to evaluate the efficacy of a cost-effective, 4-month computerized diet and physical activity intervention program, delivered by e-mail, within the worksite environment. The intervention program will be built on an existing prototype that showed both technical feasibility and potential scientific merit in a 12-week pilot study. In the first stage of the current study, we will develop that prototype further both in terms of content and technical capabilities. Specifically, we will add a physical activity component (designed to increase walking and decrease sedentary behavior), and will further tailor messages to participants' stage of readiness for change, self efficacy and lifestyle characteristics. We will also enhance the interactive features, such as a tool that simulates the overall effects of a specific change in diet or physical activity. In the second stage of the study, we will conduct a 2-arm randomized trial of the intervention program in employees of Northern California Kaiser Permanente (KP). Approximately 2,000 employees from 20 regional KP departments will be invited to participate in the trial through an e-mail from KP leaadership that describes the study, followed by an e-mail from the study staff containing baseline assessments, instructions, and informed consent. Employees who are interested in participating will return the forms by e-mail directly to study staff. Employees will be randomly assigned, in roughly equal numbers, with the department as the unit of randomization, to the intervention group, who will receive the full intervention program, or the wait-list control group, who will receive standard diet and physical activity recommendations and information. The control group may choose to receive the intervention at the end of the study period. To determine both shortterm effects and longer-term sustainability of effects, both groups will complete dietary and physical activity assessments and other questionnaires (self efficacy, social support, health-related quality of life, and demographic characteristics) at the beginning of the trial, after the 4-month intervention, and then again 8 months from baseline. In addition to physical activity and dietary behaviors, study outcomes will include health-related quality of life, absenteeism, and health care utilization. Primary analyses of differences between the intervention and control groups will be based on "intent to treat," and will account for the cluster randomization design. This e-mail-based intervention, if proven successful, could be widely and cost-effectively disseminated and, thereby contribute significantly to achieving the dietary and physical activity goals for Healthy People 2010.

描述（由申请人提供）：美国每年约有 400,000 人死亡是由于不良饮食和缺乏身体活动造成的。尽管有充分证据表明，定期体育活动以及多吃水果和蔬菜、低脂肪的饮食对健康有益，但这些行为在整个人群中的流行率仍然相对较低，在少数群体和社会经济弱势群体中甚至更低。该提案的总体目的是评估在工作现场环境中通过电子邮件提供的为期 4 个月的计算机化饮食和身体活动干预计划的成本效益。该干预计划将建立在现有原型的基础上，该原型在为期 12 周的试点研究中显示了技术可行性和潜在的科学价值。在当前研究的第一阶段，我们将在内容和技术能力方面进一步开发该原型。具体来说，我们将添加身体活动部分（旨在增加步行和减少久坐行为），并将进一步根据参与者准备改变的阶段、自我效能和生活方式特征定制信息。我们还将增强交互功能，例如模拟饮食或身体活动特定变化的整体效果的工具。在研究的第二阶段，我们将对北加州 Kaiser Permanente (KP) 的员工进行干预计划的双臂随机试验。来自 20 个区域 KP 部门的大约 2,000 名员工将被邀请参加试验，通过 KP 领导层发送的一封描述该研究的电子邮件，随后研究人员发送一封包含基线评估、说明和知情同意书的电子邮件。有兴趣参与的员工将通过电子邮件将表格直接返回给研究人员。员工将以大致相等的数量，以部门为随机单位，被随机分配到干预组，他们将接受完整的干预计划，或候补对照组，他们将收到标准饮食和身体活动的建议和信息。对照组可以选择在研究期结束时接受干预。为了确定短期效果和长期效果的可持续性，两组将在试验开始时、4 个月干预后以及从基线开始 8 个月后再次完成饮食和身体活动评估以及其他调查问卷（自我效能、社会支持、健康相关生活质量和人口特征）。除了身体活动和饮食行为外，研究结果还将包括与健康相关的生活质量、缺勤和医疗保健利用。对干预组和对照组之间差异的初步分析将基于“治疗意图”，并将考虑整群随机化设计。这种基于电子邮件的干预措施如果被证明是成功的，则可以以具有成本效益的方式广泛传播，从而为实现 2010 年健康人口的饮食和身体活动目标做出重大贡献。