HISPANIC COMMUNITY HEALTH STUDY - STUDY OF LATINOS COORDINATING CENTER DIVERSITY SUPPLEMENT FOR JOSE LOPEZ

西班牙裔社区健康研究 - 针对何塞·洛佩兹的拉丁裔协调中心多样性补充研究

• 批准号: 10722128
• 负责人: JIANWEN CAI
• 金额: $ 7.25万
• 依托单位: UNIV OF NORTH CAROLINA CHAPEL HILL
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10722128
• 关键词: Accounting; Algorithms; Categories; Cells; Complex; Data; Drops; Hispanic Community Health Study/Study of Latinos; Longitudinal Studies; Longitudinal Surveys; Methods; Participant; Performance; Prospective cohort study; Research Project Grants; Sampling; Surveys; Time; Validity of Results; Visit; Weight; design; follow-up; simulation; tool; waist circumference

Attrition often occurs in longitudinal studies, e.g., participants dropped out of the study, and results in missing data. There are three general categories of missing data mechanisms: missing completely at random (MCAR), missing at random (MAR), and not missing at random (MNAR). It is well known that if participants who returned to follow-up visits are systematically different from those who did not, using standard methods on only those who returned could provide biased results. Properly accounting for the missing data is critical to obtain valid results. Adjustment Cell Weighting (ACW) is one approach to adjust Baseline Sampling Weights (BSW) when missing is at random. This diversity supplement project proposes to implement ACW when analyzing complex longitudinal survey data using MLMs with 3 or more levels.

流失通常发生在纵向研究中，例如参与者退出研究，并导致数据缺失。缺少数据机制的三个一般类别：完全随机丢失（MCAR），在随机（MAR）中丢失，并且在随机（MNAR）时不会丢失。众所周知，如果返回后续访问的参与者与没有返回的人的标准方法有系统地不同，则可能会提供偏见的结果。正确考虑丢失的数据对于获得有效结果至关重要。调整细胞加权（ACW）是一种随机丢失时调整基线采样权重（BSW）的方法。这种多样性补充项目建议在使用具有3个或更多级别的MLMS分析复杂的纵向调查数据时实施ACW。