I was talking to a professor of psychiatry who stated cognitive decline and negative symptoms increase risk of dementia. I was doing some reading earlier that late onset schizophrenia increases the risk of dementia.
He also stated that because you have schizophrenia doesn’t necessarily mean you will get dementia.
I think you are less likely to develop dementia if you exercise both your mind and body, but that’s more of an annecdotal opinion than anything else. I was surprised to learn that my shingles vax I had is associated with lower dementia risk:
It’s more of an irritant than anything else because I like to hand-hold cameras for shooting and I have periods where my hands shake badly. They come and go right now.