The link between the Profile 2 psychological traits and cognitive decline are well established in past research. Exactly why these relationships exist isn't clear.

The study, which analyzed more than 1,000 middle-aged and older adults, shows that the specific psychological characteristics of each profile may influence the risk of developing dementia ...

Profile 2 exhibited the worst mental health symptomology and lowest sleep quality in both older age and middle age." Overall, the results of this study suggest that psychological characteristics ...