Dynamic Links Between Memory and Functional Limitations in Old Age: Longitudinal Evidence for Age-Based Structural Dynamics From the AHEAD Study

TitleDynamic Links Between Memory and Functional Limitations in Old Age: Longitudinal Evidence for Age-Based Structural Dynamics From the AHEAD Study
Publication TypeJournal Article
Year of Publication2011
AuthorsInfurna, FJ, Gerstorf, D, Ryan, LH, Smith, J
JournalPsychology and Aging
Volume26
Issue3
Pagination546
KeywordsDemographics, Health Conditions and Status, Methodology
Abstract

This study examined competing substantive hypotheses about dynamic (i.e., time-ordered) links between memory and functional limitations in old age. We applied the Bivariate Dual Change Score Model to 13-year longitudinal data from the Asset and Health Dynamics Among the Oldest Old Study (AHEAD; N = 6,990; ages 70 - 95). Results revealed that better memory predicted shallower increases in functional limitations. Little evidence was found for the opposite direction that functional limitations predict ensuing changes in memory. Spline models indicated that dynamic associations between memory and functional limitations were substantively similar between participants aged 70-79 and those aged 80-95. Potential covariates (gender, education, health conditions, and depressive symptoms) did not account for these differential lead-lag associations. Applying a multivariate approach, our results suggest that late-life developments in two key components of successful aging are intrinsically interrelated. Our discussion focuses on possible mechanisms why cognitive functioning may serve as a source of age-related changes in health both among the young-old and the old-old. PUBLICATION ABSTRACT

Endnote Keywords

Memory/Aging/Cognitive ability/Multivariate analysis/Young adults/Personal health

Endnote ID

62608

Citation Key7605
PubMed ID21480716
PubMed Central IDPMC3575140