Stage 1: No cognitive decline
       ● Experiences no problems in daily living

Stage 2: Very mild cognitive decline
       ● "Normal forgetfulness of ageing"
       ● May forget names they formerly knew well
       ● May forget where they have placed familiar objects

       ● No problems at work or in social situations
       ● No objective evidence of memory deficit on clinical interview.
       ● Patient displays appropriate concern about their symptoms.

Stage 3: Mild cognitive decline
       ● May get lost when driving
       ● Decreased work performance

       ● Family can notice the cognitive decline
       ● Denial and anxiety may start appearing

Stage 4: Moderate cognitive decline
       ● Has difficulty with complex tasks like finances, shopping and planning a dinner party

       ● May start to withdraw from family and friends
       ● Denial is common
       ● There is objective evidence of memory and concentration deficits

Stage 5: Moderately severe cognitive decline
       ● Needs help to choose clothing
       ● Needs prompting to bathe

       ● Can no longer survive without some assistance
       ● Does not generally need help with toileting and eating
       ● Generally remembers their own name and the name of their spouse and children
       ● Can forget common details like address and phone number

Stage 6: Severe cognitive decline
       ● Needs help bathing
       ● Needs help with toileting or has incontinence
       ● Forgets about recent events and experiences

       ● Can develop personality and emotional changes with behavioral problems (BPSD)
       ● Generally unaware of their surroundings, the year, or the season.

Stage 7: Very severe cognitive decline
       ● Loses ability to talk or communicate
       ● Loses ability to walk and sit.
       ● Needs help with eating.

       ● Progresses to generalized rigidity and may develop primitive neurological reflexes