I don't have numbers for you, but based on 35 to 40 years of my own experience, I think it would be very difficult. When people begin to have memory, judgment or other problems, they consult someone. Most of the time, it's their GP who broadly diagnoses neurodegenerative diseases. For a more accurate diagnosis, it often requires a specialist like a neurologist, a geriatrician or a psychogeriatrician.
On May 5th, 2022. See this statement in context.