Validation of Web-based Multimedia Dietary Assessment Tools

基于网络的多媒体饮食评估工具的验证

• 批准号: 7038401
• 负责人: Lenore Arab
• 金额: $ 52.46万
• 依托单位: UNIVERSITY OF CALIFORNIA LOS ANGELES
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-28 至 2011-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7038401
• 关键词: African American; Internet; bioenergetics; biomarker; body physical activity; caucasian American; clinical research; computer program /software; computer system design /evaluation; cost effectiveness; dietary proteins; dietary supplements; epidemiology; fruit; health behavior; human subject; interactive multimedia; interview; longitudinal human study; nutrient intake activity; nutrition related tag; personal log /diary; questionnaires; racial /ethnic difference; urinalysis; vegetables

DESCRIPTION (provided by applicant): There is an increasing demand for low cost and accurate methods to measure dietary intake and physical activity in epidemiologic studies. This proposal requests funds to examine the precision of two new dietary assessment tool, the Computer-Assisted Self-Interview Diet History (CASI-DH), which is modeled after the strengths of the diet history, one of the strongest dietary assessment approaches and a fully automated multimedia 24 hour recall: DIETDAY. The CASI-DH is a web-based, self-interview approach that is meal-, audio-, and food picture-based; generates nutrient and food intake estimates; has an extensive component to assess dietary supplement use and provides feedback to help people adopt more healthful dietary habits. It differs in many significant ways from food frequency questionnaires in that it is fully quantitative, includes thousands of foods, is meal-based, and does not truncate foods or frequencies of consumption. The objective of the validation study proposed here is to test how accurately these new tools capture usual diet by comparing self-reported nutrient and food intakes obtained through the CASI-DH and using the DIETDAY to objective validation biomarkers in a sample of 150 African American and 150 Caucasian adults. Specifically, we aim to examine the validity of both instruments for intakes of nutrients (total energy, protein, and potassium), vegetables and fruits and supplement use by using doubly labeled water for total energy; 24-hour urinary nitrogen for protein; urinary potassium for dietary potassium; and blood levels of nutrients (carotenoids and tocopherols) for fruits, vegetables, and nutritional supplement use. A number of secondary aims will also be pursued, including validation of two physical activity questionnaires and two different accelerometry approaches to DLW. To study the reproducibility of the CASI-DH, DIETDAY and DLW, repeat measures will be conducted on a subset of 100 persons 6 months apart. Due to its low cost, the language independence of the system, and the reliance on images for accurate communication, the CASI-DH and DIETDAY present unique opportunities for epidemiologic research in various populations for assessment of complex dietary exposures. Successful validation of either the CASI-DH or the DIETDAY will represent important methodological advances in nutritional epidemiology. The study will also contribute to our confidence in these dietary and activity assessment instruments in multiracial populations.

描述（由申请人提供）：在流行病学研究中，对低成本和准确方法的需求越来越多。该提案要求资金检查两个新的饮食评估工具的精确度，即计算机辅助的自我采用浏览饮食历史（CASI-DH），该工具以饮食历史的优势，最强的饮食评估方法之一和全自动自动化的多媒体自动化的多媒体24小时回顾：饮食日，以最强的饮食评估方法之一进行建模。 CASI-DH是一种基于网络的自学浏览方法，是餐，音频和基于食物的；产生营养和食物摄入量；具有评估饮食补充剂使用的广泛组成部分，并提供反馈，以帮助人们采用更健康的饮食习惯。它与食品频率问卷的不同方式有所不同，因为它是完全定量的，包括成千上万的食物，是基于餐食的，并且不会截断食物或消费频率。此处提出的验证研究的目的是测试这些新工具通过比较通过CASI-DH获得的自我报告的营养和食物摄入量的准确饮食，并利用DIET日在150名非裔美国人和150名高加索成年人的样本中进行客观验证生物标志物。具体而言，我们旨在检查两种仪器对摄入摄入量（总能量，蛋白质和钾），蔬菜和水果的有效性，并通过使用双重标记的水以总能量来使用补充剂； 24小时的尿液氮用于蛋白质；饮食钾的尿钾；以及用于水果，蔬菜和营养补充剂的营养素（类胡萝卜素和生育酚）的血液水平。还将追求许多次要目标，包括验证两项体育活动问卷和两种不同的DLW加速度测定法。为了研究CASI-DH，DIETDAY和DLW的可重复性，将在相隔6个月的100人中进行重复措施。由于其成本较低，系统的语言独立性以及对图像进行准确沟通的依赖，Casi-DH和Dietday为各种人群的流行病学研究提供了独特的机会，以评估复杂的饮食暴露。成功验证CASI-DH或DIET日将代表营养流行病学的重要方法论。这项研究还将有助于我们对这些饮食和活动评估工具的信心。