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Published on: January 21, 2019
by Rick Nauert PhD for Psych Central:
A new Danish study suggests that vital exhaustion as a sign of psychological distress may be a risk factor for future dementia.
Danish researchers found that such distress in late midlife is associated with a higher risk of dementia in later life, and believe their findings will encourage improved care for mental and physical symptoms accompanying psychological distress as a means to improve quality of life and as an important tactic to reduce the occurrence of dementia.
Investigators define psychological distress as a state of emotional suffering sometimes accompanied by somatic (or body) symptoms. Vital exhaustion is characterized as feelings of unusual fatigue, increased irritability and demoralization and can be considered an indicator of psychological distress.
Vital exhaustion is suggested to be a response to unsolvable problems in individuals’ lives, in particular when being incapable of adapting to prolonged exposure to stressors.
The physiological stress response, including cardiovascular changes and excessive production of cortisol over a prolonged period, may serve as the mechanism linking psychological distress with an increased risk of dementia.
Sabrina Islamoska, a Ph.D. student from the Department of Public Health, University of Copenhagen, found a dose-response relation between symptoms of vital exhaustion reported in late midlife and the risk of dementia later in life.
“For each additional symptom of vital exhaustion, we found that the risk of dementia rose by 2 percent,” Islamoska said.
“Participants reporting 5 to 9 symptoms had a 25 percent higher risk of dementia than those with no symptoms, while those reporting 10 to 17 symptoms had a 40 percent higher risk of dementia compared with not having symptoms.”
The researchers used survey data from 6,807 Danish participants from the Copenhagen City Heart Study, who responded to questions about vital exhaustion in 1991-1994. At the time of the survey, the participants were on average 60 years.
The survey data were linked to national hospital, mortality and prescription registers in order to identify dementia cases. The participants were followed until the end of 2016.
“We were particularly concerned whether the symptoms of vital exhaustion would be an early sign of dementia. Yet, we found an association of the same magnitude even when separating the reporting of vital exhaustion and the dementia diagnoses with up to 20 years,” Islamoska said.
Despite adjusting for several other well-known risk factors for dementia, such as sex, marital status, lower educational level, lifestyle factors and comorbidities, the risk of dementia associated with vital exhaustion did not change.
“Stress can have severe and harmful consequences not just for our brain health, but our health in general. Cardiovascular risk factors are well-known modifiable risk factors for dementia, and in some countries, a stagnation or even a decreasing incidence of dementia has been observed.
“Our study indicates that we can go further in the prevention of dementia by addressing psychological risk factors for dementia,” Islamoska said.
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