Improving Diet Assessment in Adolescents

描述（由申请人提供）：饮食摄入为预防干预项目提供了一些最有价值的见解。随着人们对青少年超重和肥胖问题的日益关注，准确测量饮食的需求变得势在必行。对青少年的评估是有问题的，因为这个群体的饮食模式不规律，他们对记录食物摄入量的热情也不高。对青少年的初步研究表明，技术的创新使用可能会提高年轻人饮食信息的准确性。识别移动设备中的新兴技术，例如，更高分辨率的图片，改进的内存容量，更快的处理器，使这些设备能够处理以前不可能处理的信息。该项目通过改进和测试青少年的方法，并使用创新的方法来改善受访者的自我报告，实现了PAR-06-104的几个目标。我们的目标是开发、实施和评估一种移动设备食物记录，它将转化为青少年每日食物和营养摄入的准确记录。我们的第一步包括进一步开发我们的原型移动设备，包括数字照片，营养数据库，以及用于识别和量化食物消耗的图像处理。移动计算设备为收集饮食信息提供了一种独特的工具，减轻了记录保持者的负担。食物的图片可以用各种输入方法进行标记，这些输入方法将物品连接起来进行图像处理和分析，以估计食物的数量。食物吃前和吃后的图片可以估计食物的消耗量。我们计划招募100名知情并同意参加普渡大学夏令营的六年级、七年级、八年级和九年级学生作为样本，在受控条件下使用移动设备食物记录来帮助量化与食物和营养输出相关的误差，并食用精确已知成分的食物。对工具的改进将反映在受控环境下使用时检测到的错误的反馈和纠正。该项目的最后阶段将在103名知情并同意自由生活的11至17岁青少年中验证移动设备食品记录，分别使用尿氮、蔗糖和果糖作为蛋白质摄入量和糖摄入量的生物标志物。该工具可用于人口和临床研究，以提高我们对青少年饮食暴露的理解。

DESCRIPTION (provided by applicant): Dietary intake provides some of the most valuable insights for mounting intervention programs for prevention. With the growing concern about adolescent overweight and obesity, the need to accurately measure diet becomes imperative. Assessment among adolescents is problematic as this group has irregular eating patterns and they have less enthusiasm for recording food intake. Preliminary studies among adolescents suggest that innovative use of technology may improve the accuracy of diet information from young people. Recognition of immerging technology in mobile devices, e.g., higher resolution pictures, improved memory capacity, faster processors, allow these devices to process information not previously possible. This project addresses several objectives of PAR-06-104 by refining and testing methods for adolescents and using innovative methods to improve respondent self-report. Our goal is to develop, implement, and evaluate a mobile device food record that will translate to an accurate account of daily food and nutrient intake among adolescents. Our first steps include further development of our prototype mobile device to include digital photographs, a nutrient data base, and image processing for identification and quantification of food consumption. Mobile computing devices provide a unique vehicle for collecting dietary information that reduces burden on record keepers. Pictures of food can be marked with a variety of input methods that link the item for image processing and analysis that estimate the amount of food. Pictures before and after foods are eaten can estimate the amount of food consumed. We plan to recruit a sample of 100 informed and consenting sixth, seventh, eighth, and ninth-graders attending summer camps on the Purdue campus to consume meals of precisely known composition while using the mobile device food record under controlled conditions to aid with quantifying the error associated with the food and nutrient output. Refinements to the tool will reflect the feedback and correction of errors detected with use under the controlled environment. The final phase of the project will validate the mobile device food record among 103 informed and consenting free-living adolescents between 11 and 17 y by using urinary nitrogen and sucrose and fructose as biomarkers of protein intake and sugar intake, respectively. This tool could be used for population and clinical based studies to improve our understanding of dietary exposures among adolescents.