Which sign would most likely indicate a severe stage of Alzheimer's dementia, specifically in behavior?

The sign indicating a severe stage of Alzheimer's dementia would be the presence of dangerous behaviors to self and others. At this advanced stage, individuals often exhibit significant cognitive decline and may struggle with judgment, perception, and impulse control. Dangerous behaviors can manifest in various ways, such as wandering into unsafe situations, neglecting basic self-care, or displaying aggression, thereby posing risks not just to themselves but also to those around them.

In severe Alzheimer's dementia, the inability to recognize potential hazards highlights the advanced impairment in their cognitive and functional abilities. While confabulation, getting lost in familiar situations, and poor decision-making are concerning behaviors that can occur in earlier to moderate stages of the disease, the development of dangerous behaviors marks a more critical and severe progression of Alzheimer's, where individuals lose the capacity to assess risk effectively and maintain safety.