J Acad Nutr Diet. 2017 Oct;117(10):1528-1537. doi: 10.1016/j.jand.2017.01.027. Epub 2017 Mar 17.
Nutrition labels at the point of purchase are recommended to improve food choice, yet food choice does not always translate into food consumption. It is important to understand the relationship between label use, food selection, servings, and consumption. Previous research, which has relied on self-reported intake or inferred label use or intake based on sales data, has not adequately answered this question.
To combine survey and meal photographic data to compare food selection, servings, and consumption between label users and nonusers.
Diners were surveyed in two cross-sectional waves during the fall 2014 semester. Food selections were recorded, and pre- and postmeal photographs were taken of diners' plate. Photographs were coded to identify the selection, servings, and consumption of MyPlate food categories.
PARTICIPANTS/SETTING: Convenience sample of 1,069 diners (39% women, 53% freshman) in two university dining halls. Students had to be older than age 18 years and just beginning their meal to participate.
Selection, servings, and consumption of MyPlate food categories for label users and nonusers.
Differences in food selection were tested via χ tests, and differences in adjusted least squares means for servings and consumption were tested via t tests.
A greater proportion of nutrition label users selected fruits, vegetables, and beans and fewer selected potatoes compared with nonusers. In addition, fewer label users selected fried foods and foods with added sugars (all P values <0.05). Label users served themselves and consumed more vegetables and fewer potatoes and refined grains compared with nonusers (all P values <0.05).
Our results suggest label users behave differently compared with nonusers. Based on the meals observed, these differences appear more qualitative in nature (selecting different foods) than quantitative (selecting more or less food).
建议在购买点提供营养标签以改善食物选择，但食物选择并不总是转化为食物消费。了解标签使用、食物选择、份量和消费之间的关系很重要。以前的研究依赖于自我报告的摄入量或基于销售数据推断的标签使用或摄入量，因此没有充分回答这个问题。
结合调查和膳食照片数据，比较标签使用者和非使用者的食物选择、份量和消费。
在 2014 年秋季的两个横断面波中对用餐者进行了调查。记录了食物选择，并对用餐者的餐盘进行了餐前和餐后的照片拍摄。照片被编码以识别 MyPlate 食物类别的选择、份量和消费。
参与者/设置：在两个大学餐厅的便利样本中，有 1069 名用餐者（39%为女性，53%为新生）。学生必须年满 18 岁并开始用餐才能参加。
标签使用者和非使用者的 MyPlate 食物类别的选择、份量和消费。
通过 χ2 检验测试食物选择的差异，通过 t 检验测试份量和消费的调整最小二乘均值的差异。
与非使用者相比，更多的营养标签使用者选择水果、蔬菜和豆类，而选择土豆的比例较低。此外，与非使用者相比，较少的标签使用者选择油炸食品和添加糖的食品（所有 P 值均<0.05）。标签使用者提供的蔬菜量和消费的土豆量和精制谷物量均多于非使用者（所有 P 值均<0.05）。
我们的结果表明标签使用者的行为与非使用者不同。根据观察到的膳食，这些差异在性质上似乎更倾向于定性（选择不同的食物）而不是定量（选择更多或更少的食物）。
