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Almost half of new dementia cases occur in Asia, followed by Europe (25%), the Americas (18%) and Africa (8%). The incidence of dementia increases exponentially with age, doubling with every 6.3-year increase in age. [267] Dementia affects 5% of the population older than 65 and 20–40% of those older than 85. [273]
Late dementia symptoms can include pronounced memory loss, incontinence, and an inability to move without help. ... “About 40% of people aged 65 or older have age-associated memory impairment ...
Age-related memory loss, sometimes described as "normal aging" (also spelled "ageing" in British English), is qualitatively different from memory loss associated with types of dementia such as Alzheimer's disease, and is believed to have a different brain mechanism.
The ancient Greek and Roman philosophers and physicians associated old age with increasing dementia. [29] It was not until 1901 that German psychiatrist Alois Alzheimer identified the first case of what became known as Alzheimer's disease, named after him, in a fifty-year-old woman he called Auguste D.
Overall, the lifetime dementia risk after age 55 was 35% for men and 48% for women, the researchers concluded. Women generally live longer than men, a main reason for that difference, Coresh noted.
The onset of dementia can come as a shock, but various signs could predict the condition as long as 20 years before symptoms. ... (BMI) over 30 at age 60 was a weak predictor of dementia, a BMI ...
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