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ABSTRACT: Introduction
The challenge of accounting for practice effects (PEs) when modeling cognitive change was amplified by the COVID-19 pandemic, which introduced period and mode effects that may bias the estimation of cognitive trajectory.Methods
In three Kaiser Permanente Northern California prospective cohorts, we compared predicted cognitive trajectories and the association of grip strength with cognitive decline using three approaches: (1) no acknowledgment of PE, (2) inclusion of a wave indicator, and (3) constraining PE based on a preliminary model (APM) fit using a subset of the data.Results
APM-based correction for PEs based on balanced, pre-pandemic data, and with current age as the timescale produced the smallest discrepancy between within-person and between-person estimated age effects. Estimated associations between grip strength and cognitive decline were not sensitive to the approach used.Discussion
Constraining PEs based on a preliminary model is a flexible, pragmatic approach allowing for meaningful interpretation of cognitive change.Highlights
The magnitude of practice effects (PEs) varied widely by study. When PEs were present, the three PE approaches resulted in divergent estimated age-related cognitive trajectories. Estimated age-related cognitive trajectories were sometimes implausible in models that did not account for PEs. The associations between grip strength and cognitive decline did not differ by the PE approach used. Constraining PEs based on estimates from a preliminary model allows for a meaningful interpretation of cognitive change.
SUBMITTER: Chen R
PROVIDER: S-EPMC10524983 | biostudies-literature | 2023 Sep
REPOSITORIES: biostudies-literature
Chen Ruijia R Calmasini Camilla C Swinnerton Kaitlin K Wang Jingxuan J Haneuse Sebastien S Ackley Sarah F SF Hirst Andrew K AK Hayes-Larson Eleanor E George Kristen M KM Peterson Rachel R Soh Yenee Y Barnes Lisa L LL Mayeda Elizabeth Rose ER Gilsanz Paola P Mungas Dan M DM Whitmer Rachel A RA Corrada Maria M MM Glymour M Maria MM
Alzheimer's & dementia : the journal of the Alzheimer's Association 20230518 9
<h4>Introduction</h4>The challenge of accounting for practice effects (PEs) when modeling cognitive change was amplified by the COVID-19 pandemic, which introduced period and mode effects that may bias the estimation of cognitive trajectory.<h4>Methods</h4>In three Kaiser Permanente Northern California prospective cohorts, we compared predicted cognitive trajectories and the association of grip strength with cognitive decline using three approaches: (1) no acknowledgment of PE, (2) inclusion of ...[more]