Could we decrease Dementia cases by almost half?

[ArMaP]

One thing I see in all those possible risk factors is that physical and mental activity are possibly the main factors, as high LDL cholesterol, hypertension, smoking, obesity, depression, diabetes, excessive alcohol consumption, air pollution and social isolation are not usually associated with physical activity while vision loss, less education, hearing loss, depression and traumatic brain injury affect mental activity.

I'll try to keep both up.