The much more likely cause is people who are aging poorly are more likely to retire. My grandmother retired then experienced sharp mental decline. For a long t

The much more likely cause is people who are aging poorly are more likely to retire. My grandmother retired then experienced sharp mental decline. For a long time I thought her retirement caused the sharp mental decline. But looking back at it after learning about dementia, and talking with other family members she retired because she was experiencing mental decline which was the predecessor to dementia.