Apart from the three signs mentioned above there are other signs which can indicate the onset of dementia:
Listlessness in hobbies
Inability to complete tasks
Confusion over almost everything
Sense of direction worsens
Repetition of phrases due to memory loss
Poor judgment skill
Difficulty in adapting to changes
Movement problems are seen in vascular dementia cases
Being withdrawn or anxious is seen in case of Alzheimer’s disease
Visual hallucinations are seen in Lewy bodies cases