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Managing Cognitive DysfunctionCognitive dysfunction includes conditions ranging in seriousness from the relatively benign mild cognitive impairment (MCI) to dementia, which can be extremely debilitating. Once grouped under the catch-all term senility, these conditions have different causes, different symptoms and different treatments.
Taken together, the various forms of cognitive dysfunction represent one of the greatest health problems affecting the elderly in the United States today. Approximately 8% of Americans over 65 years of age have dementia. If you add those suffering from milder cognitive dysfunctions, the numbers rise to nearly 16%. All types of cognitive dysfunction become more common and more serious with age. Studies indicate that as many as 47% of Americans 85 years old or older have dementia; and the disease has been estimated to cost the United States nearly $100 billion annually.(1)
Mild Cognitive Impairment (MCI)A number of older persons have cognitive impairment that is worse than expected for their age and educational level but they are not "demented." Persons with mild cognitive impairment have, primarily, a decline in memory function, while early Alzheimer's Disease sufferers, for example, usually have impairments in several cognitive areas (e.g., memory and speech; speech and control of bodily movements).(2)
MCI sufferers bounce back more slowly than the average person of their age from physical problems such as a hip fracture. They have a lower life expectancy and are more likely to develop dementia.(3) Therefore, it is important to treat early mild cognitive impairment. Recent studies show that hormone replacement therapy is a promising new treatment for MCI in both men (testosterone) and women (estrogen).(8)
How Doctors Diagnose Mild Cognitive Impairment
Alzheimer's and the Different DementiasAlzheimer's is the major cause of dementia. If a doctor determines that the patient has deficits in at least two of the following (memory, language, control of bodily movement, perception, loss of ability to make decisions), as well as worsening of cognitive function, no alteration in consciousness, onset between 50 and 90 years and absence of other possible causes, then the patient most likely has Alzheimer's.(5)
Dementia is subtle. Family members fail to recognize it almost one-quarter of patients.(6)(7) A number of studies have shown that doctors are not much better.
The clinical features of the common dementias are outlined in the table below.
The Different Types of Dementia
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