A steadier ground guide to exit-seeking, which is the plain problem of heading for the door and meaning it. What she is trying to reach, what to say at the door, and how to prepare before it happens. If she is out of the house right now, call 911 and say a vulnerable adult with dementia is missing. There is no waiting period.
Before anything else: could this be physical? Restlessness that ends at the front door often starts as pain, a full bladder, hunger, or a room that is simply too warm. Check the body before you interpret the behavior.
Exit-seeking almost always has a destination attached, and the destination is usually real, though not real now. Going to work, picking up the children, getting home to a mother who has been gone for forty years. The internal clock has rolled back to a period when leaving the house at this hour was part of the job, which is why being stopped at the door does not register as safety. It registers as being kept from something she is responsible for.
The timing is a clue. Exit-seeking clusters in the late afternoon and early evening, and nobody is certain why, since fatigue, changing light and the body clock are all likely involved. It overlaps with sundowning, the late-day restlessness that builds as the light goes, and treating the two as one pattern usually works better than treating them as two problems.
A person with dementia who leaves alone is genuinely vulnerable, particularly in cold or heat, near traffic, or after dark. Most people are found within a mile or so of where they went missing, and calling early is the biggest reason they are found safe. Closeness is not the same as safety, since people who are found too late are usually found close by too, in water, ditches, hedges or sheds rather than out on the road. If you have already had a scare and drove around for twenty minutes before calling, that is what most people do the first time, and it is what the preparation below is for.
Two things run at once here: what you do at the door, and the preparation that is best done on an ordinary afternoon.
Note the time, what happened in the twenty minutes before, and where she said she was going. Exit-seeking is one of the most patterned behaviors in dementia, and the destination is usually consistent, which tells you which need to meet earlier in the day.
Staying steady here means the goal is not a person who never goes to the door. It is a walk to the door that stays calm and stays accompanied. This is also one of the most common points at which families start thinking about more help in the house, and thinking about it is not giving up, since nobody supervises another adult around the clock. If she gets out while you are asleep, that is not neglect. It is the reason chimes, locks and help exist.
Call 911 and say that a vulnerable adult with dementia is missing. There is no waiting period, and if you cannot find her within about fifteen minutes, that is long enough. Tell the dispatcher three things: any pond, creek, drainage ditch or retention basin near the house, the address of the home she talks about, and where she used to work. Those are the first places trained searchers go. Stay at the house with your phone free rather than driving the neighborhood, since the house is where she will be brought back to.