Nicklas Theresa, Saab Rabab, Islam Noemi G, Wong William, Butte Nancy, Schulin Rebecca, Liu Yan, Apolzan John W, Myers Candice A, Martin Corby K
USDA/Agriculture Research Services, Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA.
Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA.
Obesity (Silver Spring). 2017 Sep;25(9):1633-1638. doi: 10.1002/oby.21931. Epub 2017 Jul 31.
The aim of this study was to determine the validity of energy intake (EI) estimations made using the remote food photography method (RFPM) compared to the doubly labeled water (DLW) method in minority preschool children in a free-living environment.
Seven days of food intake and spot urine samples excluding first void collections for DLW analysis were obtained on thirty-nine 3- to 5-year-old Hispanic and African American children. Using an iPhone, caregivers captured before and after pictures of each child's intake, pictures were wirelessly transmitted to trained raters who estimated portion size using existing visual estimation procedures, and energy and macronutrients were calculated. Paired t tests, mean differences, and Bland-Altman limits of agreement were performed.
The mean EI was 1,191 ± 256 kcal/d using the RFPM and 1,412 ± 220 kcal/d using the DLW method, resulting in a mean underestimate of 222 kcal/d (-15.6%; P < 0.0001) that was consistent regardless of intake. The RFPM underestimated EI by -28.5% in 34 children and overestimated EI by 15.6% in 5 children.
The RFPM underestimated total EI when compared to the DLW method among preschoolers. Further refinement of the RFPM is needed for assessing the EI of young children.
本研究旨在确定在自由生活环境中，与双标水（DLW）法相比，使用远程食物摄影法（RFPM）对少数族裔学龄前儿童进行能量摄入（EI）估计的有效性。
对39名3至5岁的西班牙裔和非裔美国儿童进行了为期7天的食物摄入量记录，并采集了用于DLW分析的随机尿样（不包括首次晨尿）。照顾者使用iPhone拍摄每个孩子进食前后的照片，照片通过无线传输给经过培训的评分者，评分者使用现有的视觉估计程序估计食物份量，并计算能量和宏量营养素。进行配对t检验、平均差异分析和Bland-Altman一致性界限分析。
使用RFPM法测得的平均EI为1,191±256千卡/天，使用DLW法测得的平均EI为1,412±220千卡/天，导致平均低估222千卡/天（-15.6%；P<0.0001），且无论摄入量如何，该结果均一致。RFPM法在34名儿童中低估EI达-28.5%，在5名儿童中高估EI达15.6%。
在学龄前儿童中，与DLW法相比，RFPM法低估了总EI。评估幼儿的EI需要对RFPM法进行进一步完善。
