Abstract
In this prospective double-blind study 13 hospitalized older adults with dementia syndrome of depression (DSD) were compared to 14 with Alzheimer's dementia with a concurrent major depression on a battery of neuropsychological tests. On admission to hospital (onset), patients with DSD differed from those with Alzheimer's dementia and depression only in that the former had stronger short-term verbal memory. Resolution of depression in patients with DSD resulted in a return to normal levels in most measures of verbal functioning, but nonverbal abilities remained impaired. Three years later those with DSD continued to cognitively outperform those with Alzheimer's dementia, indicating that treating depression in DSD appears to "buy back" up to 3 years of above-baseline cognitive functioning.