Neuropsychiatric symptoms accompany dementia and also mild cognitive
impairment (MCI), a cognitive condition in elderly persons of insufficient
severity to qualify for a diagnosis of dementia. To estimate the prevalence
of neuropsychiatric symptoms among persons with dementia and MCI, Lyketsos
and colleagues evaluated participants with dementia or MCI enrolled in the
Cardiovascular Health Study using ratings from the Neuropsychiatric Inventory.
Three quarters of participants with dementia exhibited a neuropsychiatric
symptom in the previous month, with apathy, depression, and agitation/aggression
being the most common. Among participants with MCI, 43% exhibited a neuropsychiatric
symptom in the previous month, most commonly depression, apathy, and irritability.