Last updated: October 2026.
When a loved one is diagnosed with Alzheimer’s, one question almost always comes up: what should we expect, and when? The stages of the disease give you landmarks. They don’t tell the whole story: the disease progresses slowly, the stages overlap, and each person follows their own pace.
This guide focuses primarily on the stages of Alzheimer’s disease: what changes at each stage, and what can help your loved one and your family. Other types of dementia may progress differently.
4 stages or 7 stages?
The disease is often described in two ways. The Alzheimer Society of Canada describes four stages: early, middle, late and end of life. Other resources use seven stages, from Reisberg’s Global Deterioration Scale. The two overlap. The first three of the seven stages describe no or relatively mild cognitive decline. These stages do not, on their own, determine whether someone has dementia.
| 7-stage scale (Reisberg) | What you may notice | Alzheimer Society’s 4 stages |
|---|---|---|
| 1. No decline | No memory problems | Before the early stage |
| 2. Very mild decline | Small lapses, like those that come with age | Before the early stage |
| 3. Mild decline | Difficulties noticed by family (mild cognitive impairment) | Before the early stage |
| 4. Moderate decline | Trouble with complex tasks (finances, planning) | Early stage |
| 5. Moderately severe decline | Needs help with some daily activities | Middle stage |
| 6. Severe decline | Needs help with hygiene and dressing, sometimes at night | Middle, then late stage |
| 7. Very severe decline | Loss of speech and walking | Late stage and end of life |
The stages are general reference points, not exact predictions. Symptoms and the rate of progression vary from person to person. A healthcare professional can assess changes in cognition and daily functioning.
- 1
Stage 1
Early
Subtle changes
- 2
Stage 2
Middle
More help day to day
- 3
Stage 3
Late
Care day and night
- 4
Stage 4
End of life
Comfort comes first
The early stage
In the early stage, changes are often subtle. Your loved one keeps many of their abilities and mostly needs a little help, when they ask for it.
What changes
- Forgetfulness, difficulty learning new things and following conversations
- Difficulty concentrating
- Mood changes
- Mild coordination problems
What helps
- Planning care and finances early, while your loved one can take part in decisions
- Keeping a routine, meaningful activities and social ties
- A few hours of companion care: conversation, outings, reminders, a reassuring routine
The middle stage
This is often the longest stage. Memory and other abilities keep declining, and your loved one needs more help day to day. Family involvement grows a lot, and this is often when fatigue sets in.
What changes
- More help needed with daily tasks
- Confusion, late-afternoon agitation, sometimes wandering
- More difficult nights, for your loved one and for you
- Some multilingual people may find it harder to communicate in a language learned later in life and may rely more on their first language. This does not happen to everyone.
What helps
- More regular support hours, with a stable team that knows your loved one’s habits
- Respite care for the family caregiver, planned ahead rather than in a crisis
- Overnight care with someone awake all night, if nights are the main worry
- A safety net at home, like LifeCare Plus, which can detect suspected falls
- Someone who speaks your loved one’s language: our caregivers speak English, French, Spanish, Greek, Italian, Farsi and more
The late stage
In the late stage, also called the severe stage, your loved one gradually loses the ability to communicate verbally and to look after themselves. Care may be needed 24 hours a day.
What changes
- Severe impairment of memory and of recognizing time and place
- Loss of speech
- Needing help to eat, walk and use the toilet
What helps
- A continuous presence: our 24-hour home care relies on caregivers who take turns, awake at night
- Care focused on comfort, dignity and quality of life
- Coordination with the medical team, so the care plan follows the disease
End of life
At the end of life, your loved one’s physical and mental condition declines further, and care is eventually needed 24 hours a day. Care at the end of life focuses on comfort, dignity and quality of life, while addressing the person’s physical, emotional, spiritual and medical needs.
Some people can remain at home in the late stages with appropriate support, depending on their care needs, safety and available resources. Our comfort care supports this stage at home, alongside your medical and palliative care team.
And you, the family caregiver?
Watching a loved one change is a form of grief, lived while the person is still here. It is sometimes called ambiguous loss. Caregivers may experience fatigue, sadness, guilt or anger while supporting a loved one. These feelings can be difficult, and emotional support and respite care may help.
- Talk about it: L’Appui’s Info-aidant line (1 855 852-7784) is free and confidential
- Contact your regional Alzheimer Society for information and support groups
- Take a break before you run out of energy: resting is also a way of caring for your loved one
When to consider home care?
There is no single right moment. Many families start with a few hours a week early in the disease, then adjust as it progresses. Our Alzheimer’s and dementia home care supports your loved one at every stage, with a care plan revised when their condition changes.
Tell us about your loved one, or call us at 514-935-2600, day or night.
Frequently asked questions
What are the 7 stages of Alzheimer’s?
According to Reisberg’s scale: 1. no decline, 2. very mild decline, 3. mild decline, 4. moderate decline, 5. moderately severe decline, 6. severe decline, 7. very severe decline. The first three stages describe no or relatively mild cognitive decline. The staging scale does not establish a diagnosis: a healthcare professional must assess the person’s symptoms and functioning.
How long does each stage last?
It varies a lot from one person to another. The disease progresses slowly and the stages overlap. The middle stage is often the longest. Your loved one’s doctor is best placed to give you landmarks.
At what stage is 24-hour care needed?
The need for 24-hour care depends on the person’s safety, care needs, nighttime activity and available support. Some people may need continuous supervision before the late stage. Learn about our 24-hour home care.
My loved one now only speaks their mother tongue. Is this normal?
Some people with dementia may increasingly rely on their first language as the condition progresses. The extent of this change varies, and caregivers who speak the person’s preferred language may help support communication and comfort. That is why our matching takes language into account: our caregivers speak English, French, Spanish, Greek, Italian, Farsi and more.
Can someone stay at home in the late stage?
Some people can remain at home during the late stages of Alzheimer’s disease if appropriate care and supervision are available. This depends on the person’s medical needs, safety and the support available to the family. It’s a decision to make as a family, with the doctor.
What is the difference between Alzheimer’s and dementia?
Dementia describes a group of symptoms affecting memory, reasoning and independence. Alzheimer’s disease is its most common cause. There are other forms, such as vascular dementia, Lewy body dementia and frontotemporal dementia.
Are the stages the same for other types of dementia?
Not always. The stages described here mainly apply to Alzheimer’s disease. Other forms can progress differently; talk to your loved one’s doctor.
Sources: Alzheimer Society of Canada, The stages of Alzheimer’s disease (online). Reisberg B., Ferris S. H., de Leon M. J., Crook T., The Global Deterioration Scale for assessment of primary degenerative dementia, American Journal of Psychiatry, 1982. Alzheimer’s Society (UK), Losing your English: reverting to your mother tongue as dementia progresses. This article is for information and does not replace medical advice.
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