[PDF] Incidence of Dementia and Alzheimer Disease in 2 Communities

How common is Alzheimer's dementia?

• in the United States are living with Alzheimer’s dementia (prevalence) and the pace at which people newly develop the condition (incidence). The estimate of 6.7 million older adults who have Alzheimer’s dementia comes from a single longitudinal study in which participants were systematically evaluated

Is Alzheimer's becoming more common in 2021?

• turned aged 75 in 2021. A number of recent studies have reported the positive observation that the incidence rate of Alzheimer’s — the number of people per 100,000 who newly develop this condition per year — appears to have declined in the last decade or so (see “Trends in the Prevalence and Incidence of Alzheimer’s Dementia Over Time,” page 29).

Do Alzheimer's disease prevalence studies rely on brain changes?

• Almost all existing Alzheimer’s dementia prevalence studies are based on the identification of clinical symptoms to classify an individual as having Alzheimer’s dementia; they do not rely on the brain changes believed to be responsible for Alzheimer’s disease across the continuum of the disease.

What percentage of residents in residential care facilities have Alzheimer's?

• Thirty-four percent of residents in residential care facilities (that is, housing that includes services to assist with everyday activities, such as personal care, medication management and meals), including assisted living facilities, have Alzheimer’s or other dementias. 741 Sixty-one percent of residential care communities are small (four to 25