My late mother suffers from Dementia, keeps disappearing from the house, even with a helper looking after her. Fortunately, she will disappear to the market & food centre where every body knows her well, so locating her wasn't difficult. But, her frequent disappearance was really disturbing for you can't watch a person every minute of the hour, unless you shackle that person or tie to a chair!. We have no choice but to dismiss the helper & put her in a home; where she can be care for & look after 24 hours a day. She pass on in the home.
I have a friend whose father was of a similar condition, they employed a helper, but the dad found the house keys of the flat & disappeared. They was about to make a missing person report, after a few days of searching, and they tried the hospitals, & managed to find the dad there, with no ID etc.. Eventually, they place him in a home too & he too pass on there.
Mentally prepared to talk to an empty shell, & on days, when "there is sound & picture", the program that is playing goes back years, & people & events you might not even know. Prepare for "who are you"...my mother will ask that, to everyone that sees her, but me, she knows! (:-
They will do things they do not remember, so gas stoves, refrigerator, electrical appliance, kitchen utensils etc.. are dangerous , the home is the only answer..
but, if you have a lot of money ( 3 peanuts or so) or have a lot of properties & finding out that you have early dementia, I can give you my name, rank & IC number plus your choice of bank account, so that I can look after it for you, if you can't remember! heh heh heh heh