High conscientiousness correlates to lower risk of moving from NCI to MCI, with hazard ratio (HR) of 0.78, and longer periods of cognitive health, especially females. 

New Mexico Highlands University

Personality traits were most influential in the transition from no cognitive impairment (NCI) to mild cognitive impairment (MCI), when demographics, depression, and apolipoprotein (APOE) genotype presence were adjusted for.

Personality Traits and Cognitive Health

Yoneda, T., Graham, E., Lozinski, T., Bennett, D. A., Mroczek, D., Piccinin, A. M., Hofer, S. M., & Muniz-Terrera, G. (2023). Personality traits, cognitive states, and mortality in older adulthood. Journal of Personality and Social Psychology, 124(2), 381–395. https://doi.org/10.1037/pspp0000418

Personality Traits, Cognitive States, and Mortality in Older Adulthood

Conscientiousness and Cognitive Health

High neuroticism relates to higher risk of going from NCI to MCI, with hazard ratio (HR) of 1.12, and increased risk of dementia. Those with less neuroticism had longer periods of cognitive health, especially females. There is an association between neuroticism and cortisol. Cortisol can wear down hippocampus, which can add to poor cognitive outcomes.

Neuroticism and Cognitive Health

Those that were more extroverted had longer duration of cognitive health, especially females.

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