Alzheimer's disease is the most common form of dementia, affecting millions of people worldwide.
The prevalence and incidence rates vary by age, sex, race, and geographic location.
According to the Alzheimer's Association, an estimated 5.8 million Americans were living with Alzheimer's disease in 2020, and this number is projected to increase to nearly 14 million by 2050.
Globally, the World Health Organization estimates that around 50 million people have dementia, with Alzheimer's disease being the most common cause.
The incidence of Alzheimer's disease increases with age, and it is more common in women than in men.
Additionally, certain genetic and environmental factors may increase an individual's risk of developing the disease.
It is important to note that these numbers are estimates and may vary depending on the source and methodology used in the studies.
Katz MJ, Lipton RB, Hall CB, Zimmerman ME, Sanders AE, Verghese J, Dickson DW, Derby CA: Age-specific and sex-specific prevalence and incidence of mild cognitive impairment, dementia, and Alzheimer dementia in blacks and whites: a report from the Einstein Aging Study. Alzheimer Dis Assoc Disord. , 26 (4): 335-43.
Mayeux R, Stern Y: Epidemiology of Alzheimer disease. Cold Spring Harb Perspect Med. 2012, 2 (8): .
Hebert LE, Scherr PA, Bienias JL, Bennett DA, Evans DA: Alzheimer disease in the US population: prevalence estimates using the 2000 census. Arch Neurol. 2003, 60 (8): 1119-22.
de Figueiredo JM: Methodological aspects of comparative research in the epidemiology of Alzheimer disease. Am J Geriatr Psychiatry. , 10 (4): 373-85.
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