It's important to note that none of this decline was attributed to medications which are meant to manage the symptoms. These medications are, IMO, largely useless.
Some studies show that the medications efficiency is variable, but in college I did a long term study with elder people with dementia, and guess what was the conclusion? The ones that did not take meds had bigger cognitive losses, and the ones that did take meds on early dementia stages had a smaller loss.
