An Elderly Person Has Been Diagnosed with a Neurocognitive Disorder

Multiple Choice

An elderly person has been diagnosed with a neurocognitive disorder, but the disorder is not Alzheimer's disease. Among the elderly, such a diagnosis is:

A) very rare-only about 2 percent of neurocognitive disorders are not Alzheimer's disease.
B) unusual-only about 10 percent of neurocognitive disorders are not Alzheimer's disease.
C) common-about a third of neurocognitive disorders are not Alzheimer's disease.
D) very common-about half of neurocognitive disorders are not Alzheimer's disease.