Shankar A V, Gittelsohn J, Stallings R, West K P, Gnywali T, Dhungel C, Dahal B
Division of Community Health and Health Systems, E8009, Department of International Health, School of Hygiene and Public Health, Johns Hopkins University, 615 N. Wolfe St, Baltimore, MD 21205, USA.
J Am Diet Assoc. 2001 Jan;101(1):47-52. doi: 10.1016/S0002-8223(01)00014-1.
This paper compares the accuracy of visual estimations of children's food intake in settings where several children eat together off 1 plate vs individual-plate eating scenarios.
Eight trained observers were tested in their ability to estimate food portions consumed by children enacting common eating scenarios. Foods were categorized by food group and according to their presentation by individual-plate and shared-plate. Observed food weight estimates were compared to actual weights.
SUBJECTS/SETTING: The 8 observers visually estimated 69 food portions of children eating alone and 26 portions where children were eating from a shared plate. This study was carried out in Sarlahi District, a rural, central lowland region of Nepal.
Pearson's correlation coefficients were calculated to examine associations between estimated and actual weights. A fixed effects model was constructed to compare observers.
Analyses revealed that observer estimates of food weights under field conditions were well correlated with actual weights for individual-plate (r = 0.89) and for shared-plate (r = 0.84) scenarios. Observers estimated food weights when children ate together on a shared plate less accurately than they did in settings where children ate alone. With the exception of 1 observer, observers did not differ significantly in their ability to estimate food weights. Accuracy of estimations was influenced by food weight with greater error associated with food quantities of less than 70 g.
Visual estimation is a relatively accurate, valid method of assessing child food intake under rural field conditions, and the only method to obtain accurate information on dietary intake in regions where shared-plate eating is frequent.
本文比较了在多个孩子共用一个盘子进食与单独用餐场景下，对儿童食物摄入量进行视觉估计的准确性。
对八名经过培训的观察者进行测试，评估他们对儿童在常见用餐场景下所摄入食物份量的估计能力。食物按食物类别以及单独餐盘和共享餐盘的呈现方式进行分类。将观察到的食物重量估计值与实际重量进行比较。
受试者/地点：八名观察者对69份儿童单独用餐的食物份量以及26份儿童共用一个盘子用餐的食物份量进行了视觉估计。本研究在尼泊尔中部低地农村地区的萨拉希区进行。
计算皮尔逊相关系数，以检验估计重量与实际重量之间的关联。构建固定效应模型以比较观察者。
分析表明，在实地条件下，观察者对单独餐盘（r = 0.89）和共享餐盘（r = 0.84）场景下食物重量的估计与实际重量高度相关。观察者对儿童共用一个盘子用餐时食物重量的估计不如对儿童单独用餐时准确。除一名观察者外，观察者在估计食物重量的能力上没有显著差异。估计的准确性受食物重量影响，食物量小于70克时误差更大。
视觉估计是在农村实地条件下评估儿童食物摄入量的一种相对准确、有效的方法，也是在频繁出现共用盘子用餐的地区获取饮食摄入量准确信息的唯一方法。
