VALDIDATION OF A NEW FOOD FREQUENCY QUESTIONNAIRE

这项研究的目的和目的是： L)检验了与营养摄入量相关的假设 据估计，对于一款创新的、 认知开发的食物频率问卷(FFQ)比两个 常用FFQ(NCI-Block健康习惯和病史问卷 (HHHQ)和哈佛-威利特问卷(WQ))。 2)检验假设(在20%的受调查者中) 血浆类胡萝卜素水平与新FFQ的相关性更高 比使用HHHQ或WQ获得的数据更多。 为了实现这些目标，正在进行一项研究， 承包商将收集或在其中定义的自由生活人口 提供以下数据： 1)在一个疗程内实施FFQ和24小时饮食召回 年。 2)所有24小时饮食召回和FFQ的营养摄入量。 3)血液样本将被分析血浆类胡萝卜素和 20%的样本中含有脂类。 合同签订后，NCI调查员将履行所有 FFQ与24小时膳食相关性的统计分析 召回和血液检测。

The goals and objectives of this study are: l) To test the hypothesis that correlations with nutrient intake estimated by multiple 24-hour recalls will be greater for an innovative, cognitively-developed food frequency questionnaire (FFQ) than for two commonly used FFQs (the NCI-Block Health Habits and History Questionnaire (HHHQ) and the Harvard-Willett Questionnaire (WQ)). 2) To test the hypothesis (in a 20% subsample of respondents) that the correlations between plasma carotenoid levels and the new FFQ are higher than those obtained using either the HHHQ or the WQ. In order to accomplish these goals, a study is being conducted in a defined free-living population in which the contractor will collect or provide the following data: 1) FFQs and 24-hour dietary recalls administered over the course of one year. 2) nutrient intakes from all 24-hour dietary recalls and FFQs. 3) blood specimens which will be analyzed for plasma carotenoids and lipids in a 20% subsample. Following the contract, the NCI investigators will perform all statistical analyses of correlations between the FFQs, 24-hour dietary recalls, and blood measures.