Abstract

Objectives

This study compares estimates and determinants of within-individual changes in mobility across surveys of older U.S. adults.

Methods

Data come from the Health and Retirement Study (HRS) and the Midlife in the United States (MIDUS) study. Measures of mobility comprise self-reported level of difficulty with walking several blocks, going up several flights of stairs, lifting and carrying 10 pounds, and stooping. Predictors include sociodemographic characteristics and indicators of health and health behaviors. We pool the datasets and estimate weighted lagged dependent variable logistic regression models for each activity, assessing cross-study differences using interaction terms between a survey indicator and relevant variables.

Results

Estimates of declines in mobility differ substantially across surveys for walking, lifting and carrying, and stooping, but there are no between-survey differences in the probability of (not) recovering from a limitation. With the exception of age, determinants of change are similar between studies. For lifting/carrying and stooping, the age-related increase in developing limitations is less steep at younger ages for HRS respondents than MIDUS respondents, but steeper at older ages.

Discussion

To compare estimates of mobility change across surveys, mobility measures would need to be harmonized. Determinants of mobility change, however, are more comparable.

中文翻译：

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流动性的变化：老年人研究中估计和预测变量的一致性。

摘要

目标

这项研究比较了美国老年人的问卷调查中个体流动性内部变化的估计值和决定因素。

方法

数据来自健康与退休研究（HRS）和美国中年（MIDUS）研究。行动能力的衡量标准包括自我报告的困难程度，包括行走几个街区，爬上几段楼梯，抬起并搬运10磅重和下弯。预测因素包括社会人口统计学特征以及健康和健康行为指标。我们汇总数据集并为每种活动估计加权的滞后因变量逻辑回归模型，并使用调查指标和相关变量之间的交互作用项评估交叉研究差异。

结果

在步行，举重，搬运和弯腰的调查中，行动力下降的估计值存在很大差异，但调查（或不）从限制中恢复的可能性在调查之间没有差异。除年龄外，研究之间变化的决定因素相似。对于举升/携带和弯腰，HRS受访者在年轻时的年龄发展限制增长与年龄相关，而MIDUS受访者的增长不那么陡峭，但在老年人中则较陡峭。

讨论区

为了比较各个调查之间流动性变化的估计值，需要统一流动性度量。但是，流动性变化的决定因素更具可比性。