Validity of Diet and Activity Measures in Women

女性饮食和活动措施的有效性

• 批准号: 7816062
• 负责人: Walter C. Willett
• 金额: $ 625.13万
• 依托单位: HARVARD SCHOOL OF PUBLIC HEALTH
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-30 至 2012-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7816062
• 关键词: Animals; Basal metabolic rate; Biological Markers; Blood specimen; Calibration; Cancer Etiology; Carotenoids; Chronic Disease; Cohort Studies; Collection; Confidence Intervals; Country; Data; Databases; Diet; Diet Records; Dietary Assessment; Dietary Fats; Dietary intake; Disease; Eating; Energy Intake; Energy Metabolism; Evaluation; Fasting; Fatty Acids; Folate; Food; Frequencies; Funding; Future; Gender; Height; Hour; Incidence; Intake; Investigation; Label; Lipids; Literature; Malignant Neoplasms; Measurement; Measures; Methods; Monitor; Morphologic artifacts; Motion; Nitrogen; Nurses' Health Study; Nutrient; Online Systems; Paper; Participant; Patient Self-Report; Physical activity; Plasma; Potassium; Potential Energy; Prospective Studies; Proteins; Public Health; Publishing; Questionnaires; Records; Relative (related person); Relative Risks; Request for Proposals; Research Design; Research Infrastructure; Research Personnel; Self-Administered; Series; Sodium; Stimulus; Structure; System; Time; Training; Validation; Variant; Water; Weight; Woman; Work; base; cohort; design; diet and cancer; disorder risk; instrument; malignant breast neoplasm; men; parent grant; public health relevance; response; time interval; urinary; validation studies

DESCRIPTION (provided by applicant): Large prospective studies of diet and cancer have often not supported hypotheses that were based on animal and ecological findings; one possible explanation could be large measurement errors in the assessment of diet. Thus, NCI has requested proposals for a series collaborative validation/calibration studies imbedded in existing cohorts using a common design with multiple self-reported and biomarker measures of diet and physical activity including doubly labeled water (DLW), urinary nitrogen (UN) and motion monitors. Thus, we propose to conduct such a study among 750 women in the Nurses' Health Study (NHS) and Nurses' Health Study II (NHSN), which will be of particular value because these cohorts have provided much of the data that have not supported several prominent hypotheses. Also, in these studies we have already collected extensive dietary data using multiple measures of intake and plasma biomarkers of diet; this will allow the evaluation of the validity of dietary assessment methods over a 20-year period. The proposed study design will consist of two FFQ's administered one year apart; in the year between these measures we will collect four 24-hour recalls using the new NCI automated self-administered 24-hour recall (ASA24), two 7-day dietary records, and biomarkers of diet including one assessment of energy expenditure using doubly-labeled water (DLW, with a replication in 100 women), four 24-hour urinary measures of nitrogen (a measure of protein intake), sodium and potassium, and two fasting blood samples for plasma levels of specific fatty acids, standard lipids, carotenoids, and folate. Physical activity will be assessed twice (together with the FFQ's) by the modified Paffenbarger physical activity questionnaire used in our studies, four 24-hour recalls using an automated system developed by the NCI, twice by an objective physical activity monitor, and by DLW (subtracting resting metabolic rate). These multiple measurements will allow an evaluation of the error structure associated with dietary and physical activity assessment methods, in particular the influences of variation over time for each method and correlated errors between methods. This will provide information of the relative and absolute validity of the different measures, and inform the interpretation of the published literature on diet and cancer (allowing the correction of observed relative risks and confidence intervals for measurement error) and the design of future validation/calibration studies. Additional analyses will indicate the optimal approaches to adjust nutrient intakes for total energy intake, which is critical for the interpretation of epidemiologic findings. PUBLIC HEALTH RELEVANCE: The proposed validation/calibration study will provide quantitative data on the validity of the methods that have been used in cohort studies to measure diet and physical activity. This information would greatly enhance the value of the data that have been collected and would also provide invaluable guidance for the design and collection of future data on diet and physical activity and cancer by other investigators, resulting in great benefit to public health.

描述（由申请人提供）：关于饮食和癌症的大型前瞻性研究通常不支持基于动物和生态发现的假设；一种可能的解释是饮食评估中存在较大的测量误差。因此，NCI 已请求提出一系列协作验证/校准研究的建议，这些研究嵌入现有队列中，使用通用设计，包括饮食和身体活动的多种自我报告和生物标志物测量，包括双标记水 (DLW)、尿氮 (UN) 和运动监测器。因此，我们建议在护士健康研究 (NHS) 和护士健康研究 II (NHSN) 中对 750 名女性进行这样的研究，这将具有特别的价值，因为这些队列提供了许多不支持几个突出假设的数据。此外，在这些研究中，我们已经使用多种摄入量测量和饮食的血浆生物标志物收集了广泛的饮食数据；这将能够评估20年期间饮食评估方法的有效性。拟议的研究设计将包括两次间隔一年的 FFQ；在这些措施之间的一年中，我们将使用新的 NCI 自动自我管理 24 小时回忆 (ASA24) 收集四次 24 小时回忆、两项 7 天饮食记录和饮食生物标志物，包括使用双标记水（DLW，在 100 名女性中重复）进行的一次能量消耗评估、四次 24 小时尿氮测量（一种蛋白质摄入量测量）、钠和 钾，以及两份空腹血样，测定特定脂肪酸、标准脂质、类胡萝卜素和叶酸的血浆水平。身体活动将通过我们研究中使用的修改后的 Paffenbarger 身体活动问卷进行两次评估（与 FFQ 一起），使用 NCI 开发的自动化系统进行四次 24 小时回忆，通过客观身体活动监测器评估两次，并通过 DLW（减去静息代谢率）进行评估。这些多次测量将允许评估与饮食和身体活动评估方法相关的误差结构，特别是每种方法随时间变化的影响以及方法之间的相关误差。这将提供不同措施的相对和绝对有效性的信息，并为已发表的饮食和癌症文献的解释提供信息（允许纠正观察到的相对风险和测量误差的置信区间）以及未来验证/校准研究的设计。额外的分析将表明调整营养摄入量以适应总能量摄入的最佳方法，这对于解释流行病学发现至关重要。公共卫生相关性：拟议的验证/校准研究将提供有关队列研究中用于测量饮食和身体活动的方法有效性的定量数据。这些信息将极大地提高已收集数据的价值，也将为其他研究人员设计和收集未来有关饮食、身体活动和癌症的数据提供宝贵的指导，从而为公众健康带来巨大利益。