Ries C P, Kline K, Weaver S O
J Am Diet Assoc. 1987 Apr;87(4):463-8.
The purpose of this study was to investigate the impact of eating away from home (at commercial establishments) on nutrient adequacy by examining frequency of eating away from home, the nutritional value of foods eaten both away and at home, and the nutritional adequacy of the daily diets of individuals. Data from 3,500 individuals, 15 years of age or older, interviewed in the fall quarter of the 1977-78 Nationwide Food Consumption Survey were used. Results indicate that although the nutrient density of food eaten away from home was lower than that of food eaten at home, the persons studied did not eat out frequently enough to influence the adequacy of their diets significantly. The low nutrient density of food eaten away from home does suggest, however, that individuals could be putting themselves at risk of some nutrient inadequacies (particularly of calcium and vitamins A, B-6, and C) or of caloric excess if they substantially increase their frequency of eating away from home. Teenagers and senior citizens seem most vulnerable to potential nutritional inadequacies.
本研究的目的是通过考察外出就餐（在商业场所）的频率、外出和在家所吃食物的营养价值以及个体日常饮食的营养充足性，来调查外出就餐对营养充足性的影响。研究使用了1977 - 1978年全国食品消费调查秋季季度对3500名15岁及以上个体进行访谈的数据。结果表明，尽管外出就餐所吃食物的营养密度低于在家所吃食物，但所研究的人群外出就餐频率不够高，不足以显著影响其饮食的充足性。然而，外出就餐所吃食物的低营养密度确实表明，如果个体大幅增加外出就餐频率，他们可能会面临某些营养素不足（特别是钙以及维生素A、B - 6和C）或热量过剩的风险。青少年和老年人似乎最容易受到潜在营养不足的影响。
