Cornman Jennifer C, Glei Dana A, Weinstein Maxine
Jennifer C. Cornman Consulting, Granville, Ohio.
Center for Population and Health, Georgetown University, Washington, D.C.
J Gerontol B Psychol Sci Soc Sci. 2021 Jan 1;76(1):209-218. doi: 10.1093/geronb/gbz091.
This study compares estimates and determinants of within-individual changes in mobility across surveys of older U.S. adults.
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.
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.
To compare estimates of mobility change across surveys, mobility measures would need to be harmonized. Determinants of mobility change, however, are more comparable.
本研究比较了美国老年成年人调查中个体活动能力变化的估计值及其决定因素。
数据来自健康与退休研究（HRS）和美国中年研究（MIDUS）。活动能力的测量包括自我报告的走几个街区、上几层楼梯、提起和搬运10磅重物以及弯腰的困难程度。预测因素包括社会人口学特征以及健康和健康行为指标。我们合并数据集，并针对每项活动估计加权滞后因变量逻辑回归模型，使用调查指标与相关变量之间的交互项评估跨研究差异。
在步行、提起和搬运以及弯腰方面，不同调查中活动能力下降的估计值存在显著差异，但在（未）从活动受限中恢复的概率方面，不同调查之间没有差异。除年龄外，各项研究中变化的决定因素相似。对于提起/搬运和弯腰，与年龄相关的活动受限发生率增加在HRS受访者中，在较年轻年龄段比MIDUS受访者平缓，但在较年长年龄段更陡峭。
为了比较不同调查中活动能力变化的估计值，活动能力测量方法需要统一。然而，活动能力变化的决定因素更具可比性。
