This model is commonly used in both clinical and caregiving settings due to its straightforward approach:
- Mild (Early): Subtle memory loss, slight problems with organization or planning, mild coordination problems, and mood changes. Lasts roughly 2-4 years.
- Moderate (Middle): Notable memory loss, inability to recognize friends/family, confusion, need for increased help with daily tasks, personality and behavioral changes. Lasts about 2-10 years.
- Severe (Late): Complete dependence, inability to communicate, severe cognitive and physical decline, need for round-the-clock care, loss of mobility and eventual end-of-life complications. Lasts 1-3+ years.[5]