Pennington J A
Food and Drug Administration, Center for Food Safety and Applied Nutrition, Washington, DC 20204.
Food Addit Contam. 1992 May-Jun;9(3):253-64. doi: 10.1080/02652039209374069.
Some total diet studies are based on the selection and analysis of core foods in a national or regional food supply. One way to select core foods is by computerized evaluation of the daily food intakes reported by subjects participating in national food consumption surveys. The foods consumed by the population groups of concern may be aggregated into core food groups. The foods within each group may be ranked according to daily intake and weight percentage of the total diet. The food that best represents each group may then be identified as a core food, and the daily consumption levels for each food group may then be assigned to the core food representing the group. Consumption levels may be determined for the specific age-sex categories of concern. To assess the representativeness of core foods identified in this manner, the food composition database of the national survey may be used to determine nutrient intakes based on the full range of foods in the database versus nutrient intakes based on the core foods.
一些总膳食研究基于对国家或地区食物供应中核心食物的选择和分析。选择核心食物的一种方法是通过对参与国家食物消费调查的受试者报告的每日食物摄入量进行计算机化评估。相关人群消费的食物可汇总为核心食物组。每组内的食物可根据每日摄入量和在总膳食中的重量百分比进行排序。然后，最能代表每组的食物可被确定为核心食物，每个食物组的每日消费水平可分配给代表该组的核心食物。可以针对特定的目标年龄-性别类别确定消费水平。为评估以这种方式确定的核心食物的代表性，可以使用国家调查的食物成分数据库，根据数据库中所有食物来确定营养素摄入量，并与基于核心食物的营养素摄入量进行比较。
