True or false: Alzheimer’s disease occurs in a limited number of people and is thus the least common form of dementia.

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Statement under consideration: 'True or false: Alzheimer’s disease occurs in a limited number of people and is thus the least common form of dementia.'
Option 1: True. This would claim that Alzheimer’s disease is rare and less common than other dementias. In reality, that is not correct because Alzheimer’s disease is the most common form of dementia, not the least common. The prevalence of Alzheimer’s increases with age, and it accounts for a majority of dementia cases in many populations. Therefore, describing it as limited in number and least common is inaccurate.
Option 2: False. This aligns with current understanding that Alzheimer's disease is the most common cause of dementia, comprising a large majority of cases when compared to other dementias such as vascular dementia, Lewy body dementia, and frontotemporal dementia. The statement asserting it is limited in number contradicts epidemiological data showing rising prevalence with aging populations and a higher incidence relative to other dementias. Misconceptions often involve thinking dementia is rare or that Alzheimer’s is a minor subtype, which is not supported by evidence.
Key distinction: while some dementias are indeed less prevalent (e.g., certain rare genetic forms), Alzheimer's disease remains the predominant diagnosis among dementia patients in most age groups and settings, making the claim of it being the least common incorrect.

True or false: Alzheimer’s disease occurs in a limited number of people and is thus the least common form of dementia.

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