ArticleThe Gerontologist2020
Measuring Activity Limitations Within the National Health and Aging Trends Study (NHATS).
Article in The Gerontologist, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Caregiver Availability and Racial Differences in End-Of-Life Care Quality: Evidence From the National Health and Aging Trends Study 2017-2024.Journal of the American Geriatrics Society · 2026Article
- Informal Care Receiving Among Older Adults: The Role of Multimorbidity and Intersectional Social Position.The Gerontologist · 2025Article
- Informal Caregivers Provide Considerable Front-Line Support In Residential Care Facilities And Nursing Homes.Health affairs (Project Hope) · 2022Article
- Environmental barriers matter from the early stages of functional decline among older adults in France.PloS one · 2022Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
BACKGROUND AND
objectivesTo better understand the disablement process among older adults, improved measures of activity limitations are needed. Traditional population-level measures lack the ability to distinguish precise gradations of activity limitation and are unable to detect degrees of differences over a wide range of ability levels. Therefore, we used contemporary measurement methods to improve upon current methodologies for characterizing activity limitations within the National Health and Aging Trends Study (NHATS) . RESEARCH DESIGN AND
methodsWe used the NHATS Round 1 cohort to assess the feasibility of constructing an Activity Limitations scale using Rasch item response theory methods. Factor analysis was used to develop the scale from a set of existing items in the NHATS Mobility, Self-Care, and Household Activity domains. Psychometric properties of the scale were evaluated and the scale was used to examine change in activity limitations among the sample from 2011 to 2015.
resultsResults supported an 18-item scale (N = 7,609). Rasch infit and outfit statistics were within acceptable range for all items (Cronbach's alpha = 0.95; sample score reliability = 0.83). From 2011 to 2015, 5.88% older adults demonstrated increase in function, 15% showed decrease in function, and 78% of the sample showed no change (did not exceed ± MDC90). DISCUSSION AND IMPLICATIONS: Findings demonstrate that a unidimensional, interval scale of activity limitations can be constructed using traditional survey measures nested within the NHATS. Results revealed concerns regarding ceiling effects within the current self-report items of activity limitations suggesting future work is needed to expand the range of ability currently represented in the NHATS Activity Limitation items.
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