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Apolipoprotein E ε4 allele effects on longitudinal cognitive trajectories are sex and age dependent

Published:September 24, 2019DOI:https://doi.org/10.1016/j.jalz.2019.07.011

      Abstract

      Introduction

      Questions remain about whether apolipoprotein E (APOE)-ε4 effects on cognitive decline are similar in men and women and how APOE-ε4 and age interact to influence decline in different cognitive domains.

      Methods

      In sex-stratified analyses, baseline age-dependent associations between APOE-ε4 status and longitudinal cognitive trajectories were examined in cognitively normal Caucasian older adults (631 men, 561 women, baseline age range: 50–93, 6733 assessments).

      Results

      In men, older baseline age was associated with greater effects of APOE-ε4 on longitudinal decline in memory and executive function, detectible from baseline age of 64 and 68, respectively. In women, older baseline age was associated with greater APOE-ε4 effects on longitudinal decline in attention, detectible at baseline age of 66. No significant APOE-ε4 effects were found for language, visual-spatial ability, or processing speed.

      Discussion

      Results highlight the importance of considering sex and age when assessing APOE-ε4–associated vulnerability to cognitive decline.

      Keywords

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