Women live much longer and more comfortable lives. Men are more likely to die before alzheimer can even manifest.
1. https://www.cdc.gov/nchs/products/databriefs/db548.htm 2. https://www.mayoclinic.org/diseases-conditions/alzheimers-di...
Also compare retirement ages, years worked, income (hard mental work)... it is well known that alzhaimer is corellated with brain activity (like solving suduku puzzles). Watching tv all day is not very healthy for brain...
“Older age is the greatest risk factor for Alzheimers and other dementias, and women live longer than men on average; this survival difference contributes to higher prevalence of Alzheimer's and other dementias in women than in men.
However, it is not clear that the risk of developing Alzheimer's or other dementias differs between men and women of the same age. Most studies of incidence in the United States have found no meaningful difference between men and women in the proportion who develop Alzheimer's or other dementias at any given age. Similarly, some European studies have reported a higher incidence among women at older ages while others have reported higher incidence among men.”
I’ll happily apologize for being in the weeds on incidence vs. prevalence.
The datasheet does have some really interesting info on genetic risk factors such as APOE-e4 and the “strength” of modifiable risk factors such as diet, exercise, and social activity — “In the United States, a study involving more than 375,000 participants estimated that nearly 37% of dementia cases were associated with eight modifiable risk factors”, qtd from the same document linked above
For example, women in the US have a lower life expectancy than men in Australia (go figure). Now women are less than 1.4 times more likely than men to get dementia in australia, but about 2 times more likely to get alzheimer in the US. So that kind of points in your direction, but that is of course wildly inaccurate, cause one is mentioning dementia the other only alzheimer and whatnot.
https://www.worldometers.info/demographics/life-expectancy/ https://www.aihw.gov.au/reports/dementia/dementia-in-aus/con... https://www.alz.org/getmedia/ef8f48f9-ad36-48ea-87f9-b740346...
Edit: qwen and glm seem to also agree with parent. "Age is the dominant risk factor".