Final answer:
Neuroticism, a Big Five personality factor, has been linked to an increased risk of Alzheimer's disease in older adults, where higher levels of this trait correlate with greater susceptibility to chronic health problems.
Step-by-step explanation:
Among the Big Five personality factors, neuroticism has been linked to an increased risk of older adults developing Alzheimer's disease across a 6-year time frame. A higher level of neuroticism, which includes traits such as anxiety, moodiness, and sadness, has been identified as a risk factor for chronic health problems and mortality. This suggests a correlation where individuals with higher levels of neuroticism may be more susceptible to conditions like Alzheimer's disease. Conversely, factors such as conscientiousness and agreeableness tend to increase with age and are associated with positive outcomes in older adults. However, neuroticism is the factor among the Big Five that has been associated with negative health implications.