Progressive dementia is the most common type, with five progressive stages:

• With stage one, there is no impairment. There is no significant memory problem, judgment is normal, and your loved one is fully able to care for their personal needs.
• Stage two is characterized by slight impairments, such as memory inconsistencies and struggles with timing or solving problems. They can still manage personal care without any help.
• Stage three is a noticeable but mild impairment in areas such as short-term memory, disorientation and getting around. Chores may begin to be neglected. Reminders are needed for such things as personal hygiene.
• A person with stage four has a moderate impairment. Though well enough to go out, they need to be accompanied for social activities and chores.

Stage five is severe impairment – the inability to function without help. Stage 5 is characterized by extreme memory loss, confusion and lack of orientation. At this stage, everyday functions are almost impossible, even with assistance.