Validation of the EARTH Study Diet History Questionnaire

描述(由申请者提供)：本提案的目标是验证美国印第安人和阿拉斯加原住民在地球队列研究中使用的饮食历史问卷(DHQ)。这项父母队列研究的主要目标是确定饮食、体力活动和其他生活方式和文化因素如何与慢性病的发展和进展有关，并以了解与癌症的关系为长期目标。因此，准确测量饮食、体力活动和其他暴露对于发现有意义的关系的能力至关重要。DHQ提供了对食物和营养素消费的全面评估，结果可以在个人层面上进行解释。一个自行管理的计算机辅助版本的DHQ已经被开发出来，用于地球研究队列。然而，在美洲印第安人和阿拉斯加原住民中，既没有确定使用自我管理的计算机辅助DHQ来衡量过去一年的摄入量的可行性，也没有确定DHQ用于测量饮食暴露的有效性。大多数关于美洲印第安人和阿拉斯加原住民饮食的信息都是基于一次24小时的回忆，没有反映出个人通常的摄入量，也没有考虑到季节性变化对这一人群摄入量的潜在影响。这个项目的目的是评估DHQ在过去一年中通常摄取的食物的有效性。将评估几个组成部分：1)自我管理的计算机辅助DHQ在营养摄入量(蔗糖、能量、脂肪、纤维和其他)、食物消耗(水果、蔬菜和自给食品)和饮食模式(西式和传统)方面的相对有效性；2)DHQ在营养摄入量(蔗糖、能量、脂肪、纤维和其他)、食物消耗(水果、蔬菜和自给食品)和饮食模式(西式和传统)方面的重复性(可靠性)；3)在营养摄入量(蔗糖、能量、脂肪、纤维和其他)、食物摄入量(水果、蔬菜和自给性食品)和饮食模式(西方与传统)方面，DHQ的计算机化自我管理与自我管理的纸张和铅笔管理之间的差异。

DESCRIPTION (provided by applicant): The goal of this proposal is to validate a dietary history questionnaire (DHQ) used in the EARTH cohort study of American Indians and Alaska Natives. The major goal of this parent cohort study is to determine how diet, physical activity, and other lifestyle and cultural factors relate to the development and progression of chronic disease with a long-term goal of understanding relationships with cancer. Therefore, accurate measurement of diet, physical activity and other exposures is essential to the ability to detect meaningful relationships. The DHQ provides a comprehensive assessment of foods and nutrients consumed and the results can be interpreted at the individual level. A self-administered computer-assisted version of the DHQ has been developed for use in the EARTH study Cohort. However, neither the feasibility of using the self- administered computer-assisted DHQ referring to intake over the pas year nor the validity of the DHQ for measuring dietary exposures has been established in American Indians and Alaska Natives. Most information about diet of American Indians and Alaska Natives are based on a single 24-hour recall that does not reflect "usual" individual intake and none about the potential for seasonal variability to influence intake in this population. The aim of this project is to assess the validity of the DHQ with regard to usual intake over the past year. Several components will be evaluated including :1) the relative validity of the self- administered computer-assisted DHQ with regards to nutrient intake (sucrose, energy, fat, fiber, and others), food consumption (fruits, vegetables, and subsistence foods), and dietary patterns (western vs. traditional); 2) reproducibility (reliability) of the DHQ with regards to nutrient intake (sucrose, energy, fat, fiber, and others), food consumption (fruits, vegetables, and subsistence foods), and dietary patterns (western vs. traditional); and 3) differences between computerized-self-administration and self-administered paper and pencil administration of the DHQ on the estimates of nutrient intake (sucrose, energy, fat, fiber, and others), food consumption (fruits, vegetables, and subsistence foods), and dietary patterns (western vs. traditional).