VALIDATION OF WEB-BASED MULTIMEDIA DIETARY ASSESSMENT TOOLS

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 我们的主要具体目标是验证CASI-DH和DietDay相对于恢复和浓度生物标志物的有效性，如下所示： 1)检查CASI-DH和DietDay在评估总能量摄入量方面的有效性，并与通过双标记水技术评估的总能量消耗进行比较，双标记水技术是一种金标准能量摄入验证生物标志物。 2)与PABA(对氨基苯甲酸)比较，检验CASI-DH和DietDay在评估总蛋白摄入量方面的有效性。使用相同的生物样本，对蛋白质和膳食钾进行24小时尿氮测定。 3)通过与血液中类胡萝卜素水平的比较，检验CASI-DH在评估水果和蔬菜摄入量方面的有效性。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Our primary specific aim is to validate the CASI-DH and the DietDay against recovery and concentration biomarkers as follows: 1) To examine the validity of the CASI-DH and DietDay for assessing intakes of total energy in comparison to the total energy expenditure assessed through the doubly labeled water technique, a gold standard energy intake validation biomarker. 2) To examine the validity of the CASI-DH and DietDay for assessing intakes of total protein in comparison to PABA (para-amino benzoic acid) validated 24-hour sample measurements of urinary nitrogen for protein, a well-established protein intake biomarker and for dietary potassium using the same biological sample. 3) To examine the validity of the CASI-DH for assessing intakes of fruits and vegetables, in comparison to blood levels of carotenoids.