Block G
School of Public Health, University of California, Berkeley 94720.
Am J Epidemiol. 1994 Feb 1;139(3):290-3. doi: 10.1093/oxfordjournals.aje.a116996.
The food sources of provitamin A carotenoids were estimated from data from the Second National Health and Nutrition Examination Survey (NHANES II) carried out in 1976-1980. Carrots contribute over 30% of total population intake. Dark green leafy vegetables and sweet potatoes are also major contributors. However, several items often omitted from questionnaires to assess carotenoids are also major contributors, including salad, orange juice, beef stew, and milk. Conversely, many foods often included on such questionnaires are unimportant contributors, including papayas, plums, okra, and grapes. Recent changes in databases or food habits might change some rankings, but are unlikely to change the items in a list covering the top 90% of provitamin A intake. Questionnaires should include the important sources and exclude trivial sources, to minimize misclassification.
视黄醇原A类胡萝卜素的食物来源是根据1976 - 1980年开展的第二次全国健康和营养检查调查（NHANES II）的数据估算得出的。胡萝卜占总人口摄入量的30%以上。深绿叶蔬菜和红薯也是主要贡献者。然而，一些在评估类胡萝卜素的问卷中常被遗漏的食物也是主要贡献者，包括沙拉、橙汁、炖牛肉和牛奶。相反，这类问卷中常被列入的许多食物贡献不大，包括木瓜、李子、秋葵和葡萄。数据库或饮食习惯最近的变化可能会改变一些排名，但不太可能改变涵盖视黄醇原A摄入量前90%的食物清单中的项目。问卷应纳入重要来源并排除不重要的来源，以尽量减少错误分类。
