Table 1.

The 7-Stage Model of Alzheimer’s Dementia.

Stage	Level of Impairment
1	No impairment
2	Very mild cognitive decline
3	Mild cognitive decline
4	Moderate cognitive decline (early-stage dementia)
5	Moderately severe cognitive decline (early mid-stage dementia)
6	Severe cognitive decline (late mid-stage dementia)
7	Very severe cognitive decline (late-stage dementia)

Note: Data from Reisberg et al.⁹