Development of a tool to measure food availability in the home

描述（由申请人提供）：对家庭食物环境的研究可以增加我们对能量过度消耗原因的理解，并提供线索，帮助创建有效的肥胖预防计划。对家庭食物的评估并不提供个人饮食的直接衡量标准，但确实提供了家庭食物选择的信息。不幸的是，在家中进行观察评估是昂贵和侵入性的。通过使用扫描仪将食品包装上的条形码直接输入数据文件，可以减轻负担。使用扫描仪技术的一个主要障碍是缺乏将通用产品代码（UPC）与食品的特性和营养成分联系起来的综合数据库。我们建议推进对家庭食物供应进行观察性研究所需的方法。具体而言，我们将：目标1。通过制定和实施数据收集和分析程序，利用扫描技术进行详尽的观察性家庭粮食供应清单，提高家庭粮食供应测量的准确性和可行性。目标2.确定和比较营养参数（能量、能量密度、脂肪百分比、纤维）和食物类别（水果、蔬菜、零食、加糖饮料）在家庭之间和家庭内部的差异。目标3.通过24小时召回评估目标2中规定的营养参数和食物类别，确定家庭食物供应量与膳食摄入量之间的关系。我们将从NIH资助的一项研究中招募80个家庭，该研究拍摄了非洲裔美国母亲在家中喂养婴儿的照片，并进行了3次家庭调查（间隔至少2个月）。我们将使用手持式扫描仪记录所有食品，并在我们进行的过程中添加当前可用数据库中没有的代码和产品信息。成果将包括：1）包含UPC，产品和营养信息的数据库; 2）允许数据库增强的程序; 3）在未来研究中用于功率计算的估计;和4）80个非裔美国人家庭食品环境的描述性数据。我们的工作将导致改进的方法，可用于家庭食品环境的直接评估，以及提供一个标准的方法，如问卷调查的资源密集型方法的发展。通过准确测量家中的食物，我们可以了解食物供应如何影响饮食。

DESCRIPTION (provided by applicant): Studies of the home food environment can increase our understanding of the causes of energy over- consumption and provide clues to help create effective obesity prevention programs. Assessments of foods in the home do not provide direct measures of diets in individuals, but do provide information about food choices in families. Unfortunately, observational assessments in homes are expensive and intrusive. The burden can be reduced by the use of scanners to enter barcodes on food packaging directly into data files. A major impediment to the use of scanner technology is the absence of comprehensive databases that link universal product codes (UPC) to the identity and nutrient content of foods. We propose to move forward the methodology needed to conduct observational studies of home food availability. Specifically we will: Aim 1. improve the accuracy and feasibility of home food availability measurements by developing and implementing data collection and analysis procedures that utilize scanning technology in the the conduct of exhaustive observational home food availability inventories. Aim 2. determine and compare the between- and within-household variability in nutrient parameters (energy, energy density, % fat, fiber) and food categories (fruits, vegetables, snacks, sweetened beverages). Aim 3. determine the association between home food availability and dietary intake as assessed by 24- hour recalls for nutrient parameters and food categories specified in Aim 2. We will recruit 80 families from a NIH-funded study that films African American mothers feeding infants in their homes and perform 3 home inventories (separated by at least 2 months). We will record all foods using handheld scanners and add codes and product information absent from currently available databases as we proceed. Outcomes will include: 1) a database containing UPC, product and nutrient information; 2) a program that allows augmentation of the database; 3) estimates useful for power calculations in future studies; and 4) descriptive data on 80 African American home food environments. Our work will result in improved methodology that can be used for direct assessment of the home food environment as well as provide a criterion method for the development of less resource intensive methods such as questionnaires. By accurately measuring what foods are in the home, we can learn how food availability influences diet.