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Stolz, E; Gill, TM; Mayerl, H; Freidl, W.
Short-Term Disability Fluctuations in Late Life.
J Gerontol B Psychol Sci Soc Sci. 2019; 74(8):e135-e140-e135-e140 [OPEN ACCESS]
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Autor/innen der Med Uni Graz:
Freidl Wolfgang
Mayerl Hannes
Stolz Erwin

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Late-life disability is highly dynamic but within-person short-term fluctuations have not been assessed previously. We analyze how substantial such late-life disability fluctuations are and whether they are associated with time-to-death, long-term disability trajectories, frailty, and sociodemographics. Monthly survey data (Precipitating Events Project Study) on activities of daily living/instrumental activities of daily living (ADL/IADL) disability (0-9) in the last years of life from 642 deceased respondents providing 56,308 observations were analyzed with a two-step approach. Observation-level residuals extracted from a Poisson mixed regression model (first step), which depict vertical short-term fluctuations from individual long-term trajectories, were analyzed with a linear mixed regression model (second step). Short-term disability fluctuations amounted to about one ADL/IADL limitation, increased in the last 4 years of life, and were closely associated with disability increases. Associations with frailty or sociodemographics characteristics were absent except for living alone. Short-term disability fluctuations in late life were substantial, were linked to mortality-related processes, and represent a concomitant feature of disability increases in late life. © The Author(s) 2019. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail:

Find related publications in this database (Keywords)
Health disparities
Intraindividual variability
Longitudinal methods
Short-term fluctuations
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