Validation of the EARTH Study Diet History Questionnaire

描述（由申请人提供）：本提案的目的是验证美国印第安人和阿拉斯加原住民地球队列研究中使用的饮食史问卷（DHQ）。这项父母队列研究的主要目标是确定饮食，体育活动和其他生活方式和文化因素如何与慢性疾病的发展和进展相关，长期目标是了解与癌症的关系。因此，准确测量饮食、体力活动和其他暴露对于检测有意义的关系至关重要。DHQ提供了对食物和营养素消耗的全面评估，结果可以在个人层面上解释。已经开发了一个DHQ的自我管理计算机辅助版本，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参考过去一年的摄入量的可行性，也没有确定DHQ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，这并不反映“通常”的个人摄入量，也没有关于季节性变化影响这一人群摄入量的可能性。该项目的目的是评估过去一年中DHQ在通常摄入量方面的有效性。将评估几个组成部分，包括：1）自我管理的计算机辅助DHQ关于营养摄入的相对有效性（蔗糖、能量、脂肪、纤维和其他）、食物消耗（水果、蔬菜和维持生计的食物）和饮食模式（西方与传统）; 2）可重复性健康调查表关于营养摄入量的（可靠性）（蔗糖、能量、脂肪、纤维和其他）、食物消耗（水果、蔬菜和维持生计的食物）和饮食模式（西方与传统）;以及3）DHQ的计算机化自我管理与自我管理纸笔管理在估计营养素摄入量上的差异（蔗糖、能量、脂肪、纤维和其他）、食物消耗（水果、蔬菜和维持生计的食物）和饮食模式（西方与传统）。

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).