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Stages of Alzheimer’s Disease: 7 Stages & What to Expect

Petra Boh Blog, Stages March 11, 2021August 21, 2026alzheimer's disease, dementia stages

7 stages of Alzheimer's disease from early to late stage

Stages of Alzheimer’s can help families understand how the disease may change over time and what type of support a person might need as symptoms progress.

However, Alzheimer’s disease does not follow exactly the same path in every person. Symptoms can overlap between stages, and one person may remain relatively independent in one area while needing considerable help in another.

The Alzheimer’s Association commonly describes Alzheimer’s disease in three broad stages: early or mild, middle or moderate, and late or severe.

Another widely referenced system is the seven-stage Global Deterioration Scale developed by Dr. Barry Reisberg and colleagues. This article explains those seven stages while also showing how they relate to the simpler early, middle and late-stage model.

What Are the 7 Stages of Alzheimer’s Disease?

The seven-stage model describes a gradual progression from no noticeable cognitive decline through severe Alzheimer’s disease.

The original Global Deterioration Scale was developed as a clinical framework for describing increasing cognitive and functional impairment.

The seven stages are:

No noticeable cognitive decline
Very mild cognitive decline
Mild cognitive decline
Moderate cognitive decline
Moderately severe cognitive decline
Severe cognitive decline
Very severe cognitive decline

It is important not to think of these as seven sharply separated boxes. A person can show characteristics from more than one stage at the same time.

Stages 1-3: Preclinical and Early Changes

Changes associated with Alzheimer’s disease can begin in the brain many years before obvious memory or thinking problems develop.

The National Institute on Aging describes this period as preclinical Alzheimer’s disease. Importantly, having biological changes associated with Alzheimer’s does not necessarily mean that a person will develop dementia.

Stage 1: No Noticeable Cognitive Decline

At stage 1, there are no noticeable problems with memory, thinking or everyday function.

A person generally:

Functions independently
Has no obvious memory impairment
Completes normal daily activities
Shows no clear cognitive symptoms to family or friends

This stage cannot be identified simply by observing someone’s behavior. Modern research can detect certain Alzheimer’s-related biomarkers before symptoms appear, but these tests are interpreted by medical professionals and are not used to diagnose Alzheimer’s based on symptoms alone.

Stage 2: Very Mild Cognitive Decline

At this point, a person may notice occasional memory lapses.

They might:

Forget a familiar name
Misplace keys, glasses or a phone
Have occasional difficulty recalling a word
Take slightly longer to remember information

These experiences can also occur during normal aging. Stage 2 by itself does not establish that someone has Alzheimer’s disease.

Stage 3: Mild Cognitive Decline

Changes may become more noticeable to family members, friends or coworkers.

Possible signs include:

Increasing difficulty finding the right words
Frequently losing possessions
Difficulty learning new information
Reduced concentration
Problems organizing or planning
Difficulty handling complex work responsibilities
Getting lost in unfamiliar places

Some people at this level may be diagnosed with mild cognitive impairment (MCI). MCI can have several causes and does not always progress to Alzheimer’s dementia.

If memory or thinking problems are affecting everyday life, a medical assessment is important. Doctors may use medical history, neurological examination, laboratory testing, brain imaging and cognitive tests to investigate the cause.

Stage 4: Early-Stage Alzheimer’s Disease

Stage 4 of the seven-stage model broadly corresponds with mild or early-stage Alzheimer’s disease.

This should not be confused with early-onset Alzheimer’s. Early-onset refers to Alzheimer’s disease that develops before age 65; early-stage describes the severity of the disease.

Many people in the early stages of Alzheimer’s can still live relatively independently. They may continue working, socializing and participating in familiar activities.

However, increasingly noticeable difficulties can include:

Forgetting recent conversations or events
Repeating questions
Difficulty managing money and paying bills
Problems planning meals or completing complicated tasks
Losing track of dates
Difficulty organizing appointments
Reduced ability to make sound decisions
Changes in mood, confidence or initiative

Driving ability should also be reviewed as Alzheimer’s progresses. Our article on driving and dementia explains some of the warning signs families can watch for.

Treatment During the Early Stages of Alzheimer’s

Early diagnosis has become increasingly important because treatment options have changed considerably in recent years.

According to the National Institute on Aging, medications are available to help manage Alzheimer’s symptoms.

In addition, the disease-modifying treatments lecanemab and donanemab are FDA-approved for certain people with mild cognitive impairment or mild dementia caused by Alzheimer’s disease.

These treatments are not suitable for everyone and have potentially serious risks, so eligibility needs to be assessed by an Alzheimer’s specialist.

This makes it especially important to consult an experienced doctor rather than waiting until symptoms become advanced. Depending on the situation, a care team may include neurologists, geriatricians and other dementia specialists.

Stages 5-6: Middle-Stage Alzheimer’s Disease

The middle or moderate stage is often when Alzheimer’s begins to have a much greater effect on everyday independence.

The Alzheimer’s Association notes that the middle stage can be the longest stage for many people and that care needs generally increase substantially during this period.

Stage 5: Moderately Severe Cognitive Decline

A person may still remember important details about themselves and recognize close family members, but everyday activities become increasingly difficult.

Common difficulties can include:

Forgetting their address or phone number
Becoming confused about where they are
Difficulty remembering the date or time
Needing help choosing appropriate clothing
Difficulty preparing meals
Needing reminders about medications
Problems managing personal hygiene

Assistance may be required with activities such as eating, shopping, transportation and dressing.

Families should balance safety with independence. Allowing a person to continue doing tasks they can still safely manage can help maintain confidence and quality of life.

Stage 6: Severe Cognitive Decline

Stage 6 generally involves much greater dependence on caregivers.

Memory problems become more severe, and a person may have difficulty recalling recent experiences or important details from their past.

They may also:

Confuse the names or identities of family members
Require considerable help getting dressed
Need assistance with bathing and grooming
Experience bladder or bowel incontinence
Have disrupted sleep patterns
Wander or become lost
Experience anxiety, agitation or restlessness
Develop hallucinations, delusions or paranoia

Behavioral and psychological symptoms can be particularly challenging for families. They may include anxiety, delusions, paranoia or changes in sleep and activity.

Sudden changes in behavior should not automatically be blamed on Alzheimer’s. Pain, infection, medication side effects, dehydration and other medical problems can cause rapid changes and should be discussed with a healthcare professional.

Stage 7: Late-Stage Alzheimer’s Disease

Stage 7 corresponds broadly with severe or late-stage Alzheimer’s disease.

At this stage, a person generally requires extensive assistance and supervision.

According to the Alzheimer’s Association, late-stage Alzheimer’s can involve major changes in mobility, communication, eating and personal care.

Common Changes in Stage 7

A person may:

Have very limited speech or lose the ability to communicate verbally
Need full assistance with bathing, dressing and toileting
Have difficulty walking and eventually become unable to walk
Need help sitting or changing position
Experience difficulty eating or swallowing
Lose weight
Become increasingly vulnerable to infections
Need around-the-clock care

Although verbal communication may decline dramatically, this does not mean that meaningful interaction has ended.

A familiar voice, gentle touch, favorite music and a calm environment may still provide comfort and connection. Our guide to dementia and communication discusses ways to maintain that connection as communication becomes more difficult.

How Long Does Each Stage of Alzheimer’s Last?

There is no reliable timetable for how long a person will remain in each of the stages of Alzheimer’s.

Progression varies considerably depending on factors such as:

Age at diagnosis
Overall physical health
Other medical conditions
The particular pattern of Alzheimer’s disease
Complications such as infections or falls
The person’s individual biology

The Alzheimer’s Association reports that people live an average of approximately four to eight years after an Alzheimer’s diagnosis, although some live for considerably longer.

For this reason, families should view stage descriptions as a general guide rather than a countdown.

Why Knowing the Stages of Alzheimer’s Matters

Understanding the likely progression of Alzheimer’s can help families plan before a crisis develops.

In the earlier stages, this may involve:

Discussing future wishes
Reviewing legal and financial arrangements
Evaluating driving
Organizing medication management
Making the home safer

As Alzheimer’s progresses, planning may shift toward:

Help with meals and personal care
Supervision to prevent wandering
Mobility equipment
Respite care
Home care
Assisted living or memory care
Palliative or hospice care when appropriate

Planning ahead allows the person with Alzheimer’s to participate in decisions for as long as possible.

Stages of Alzheimer’s: Closing Thoughts

The stages of Alzheimer’s provide a useful framework for understanding how memory, thinking, communication and physical abilities may change as the disease progresses.

The seven-stage system gives families a detailed picture of progression, while today’s major U.S. Alzheimer’s organizations often use the simpler categories of mild, moderate and severe Alzheimer’s disease.

Neither system can predict exactly what will happen to an individual person or when it will happen.

Instead, use the stages as a guide for recognizing changing needs, asking the right questions and planning appropriate care.

If someone’s memory or thinking has changed noticeably, especially if it is interfering with everyday activities, speak with a healthcare professional rather than trying to determine an Alzheimer’s stage on your own.

Vascular Dementia Stages and Progression

Trevor Howitt Blog, Stages, Types February 8, 2021February 1, 2024dementia, dementia stages, vascular dementia, vascular dementia stages

Vascular dementia is one of the most common types of dementia, and people who have this illness often have to go through several vascular dementia stages.

It is a disease that develops when the brain cells die because they are not getting enough nutrients and oxygen.

It can happen when there are impaired tiny blood vessels in the brain or after a person has gone through a major stroke or even a series of smaller strokes.

Because the condition does not have a cure yet, it progresses from a mild case to a severe one. Note that these stages will differ from one person to the next.

This is simply because this type of dementia is typically brought about by different conditions.

One person may experience vascular dementia following a stroke.

However, another may get it after the inner parts of the brain get damaged for one reason or another. Just like other forms of dementia, vascular dementia also tends to progress in gradual stages. This, however, happens in a more step-like manner.

Check out how the illness may affect an individual over time describing what happens during the three major vascular dementia stages below.

Vascular Dementia Stages

1st Stage

At the onset of vascular dementia, things are usually not too serious. Many individuals during this first stage can go about their daily lives without any interference.

This is because the symptoms are still somewhat stable; thus, manageable.

Most of the time, it is difficult to tell whether a person has vascular dementia or Alzheimer’s disease.

Some people may even have what is known as mixed dementia, where one has both Alzheimer’s disease and dementia.

Some people may experience things like impaired memory (general forgetfulness), challenges finding the right words, and difficulty with planning, organizing, and carrying out several tasks in an efficient manner during the first stages of this illness.

A small percentage of individuals with vascular dementia will also go through a slight decline in walking and balance. The condition at this point may also affect thinking and decision making.

At this stage, a majority of people can live alone, but it is recommended that their loved ones always check on them often.

This helps to make sure that everything is in place and that the individuals are not a danger to themselves or any other people around them.

At times, small home modifications may also come in handy to create a more supportive and comfortable environment for individuals with vascular dementia.

2nd Stage

After a person has gone through the initial vascular dementia stages, it may reach a point where the symptoms are no longer stable.

Things become worse where you might find that the affected person now has a different personality.

Depending on the cause of this dementia, many people will start going through anxiety, depression and have mood swings.

This usually occurs because a person is more aware of the changes that are happening to their bodies. Some people will become overly emotional and a majority are prone to apathy.

Other behavioral changes may include increased agitation and irritability.

Increased agitation and irritability

There may also be sessions where they are certain outbursts where a person can either cry or laugh inappropriately.

Hallucinations and delusions may also be part of the equation.

In severe cases, a percentage of individuals who have vascular dementia will also experience epilepsy episodes. Loss of social skills is also common at this stage.

You may find that a person who has the disease no longer wants to be a part of the social circles they were in before. They may not want to talk to the people they love.

You may notice that they want to spend more time indoors as a means of shutting out the world.

Most of the time, this usually comes about because a person is embarrassed about what they are going through seeing that they are no longer in complete control of their lives.

Several physical signs may also be prevalent during the middle stages of vascular dementia.

This is where a person may experience loss of bowel or bladder control. Some may also experience dizziness and tremors often.

Caregivers may also notice that the persons under their care are experiencing arm and leg weakness and maybe moving around with shuffling rapid steps.

Language and speech problems

If a person was speaking well in the past, slurred speech and other language problems might also start to show up.

Individuals with this illness should also get close monitoring when they are on the move. That’s because they tend to get lost even when they are in familiar surroundings.

Doing things like paying bills handling money or engaging in their favorite hobby becomes challenging, which can prove to be quite frustrating to the ill individual.

It’s not uncommon for a person with the illness to have difficulties sleeping during this phase.

Some individuals also display repetitive, obsessive or even impulsive behavior.

If a person is staying alone at this point, it would be best to make different housing arrangements.

They can move in with relatives who will act as caregivers and also keep an eye on the persons with the illness to prevent avoidable accidents.

If this is not possible, the family might have to look into senior care facilities where persons with vascular dementia will get professional care.

This is simply because a person at this point may need support with multiple day-to-day activities.

These may include showering, walking, dressing, eating, cooking, and using the restroom, among others.

3rd Stage

You can consider this one of the final vascular dementia stages. The symptoms that persons experience at this stage are normally severe.

These can be distressing to the weak person.

If one gets vascular dementia after suffering a stroke, the aftermath can bring out physical symptoms.

They can experience problems with speech, vision, and weakness of the limbs. These symptoms will surface if the stroke caused damage to certain parts of the brain.

Individuals who have vascular dementia may also experience similar symptoms to the people who are in their last stages of Alzheimer’s disease.

It is where issues with communication, reasoning, confusion, memory loss, and disorientation become worse.

Motor challenges

A majority of people with vascular dementia also experience motor symptoms that may include unsteady or slow gait disturbance and clumsiness.

Handling daily activities becomes increasingly difficult, too.

Delusions or hallucinations that would come and go during the previous stage worsen.

At times, persons with vascular dementia may also become violent, suspicious, and demanding of people who are around them.

Many persons have a difficult time eating and swallowing. This often leads to rapid unhealthy weight loss. Some may even experience loss of speech.

Almost everyone at this point will have significant problems with both long-term and short-term memory.

As the condition becomes worse, it may affect/damage all the functions of the brain. This is also the stage where the illness deteriorates and can end up being fatal.

Some people at this stage can also go through heart attacks or a major stroke that can end their lives.

During this stage, it might be difficult for the family to render the appropriate care. Especially if they are not around their loved ones 24/7.

This calls for other measures such as hiring a professional who will move in to look after the person who has vascular dementia.

Alternatively, the individual might have to move into a senior care community.

A place that looks after people with dementia to get the kind of assistance and care they need without compromising their health.

Closing Remarks

Anyone who has vascular dementia should not think of it as a death sentence. It is still possible to live a full life even when going through the various vascular dementia stages.

Always remember that different people will experience vascular dementia differently.

While some may go through gradual changes, others will experience a decline in cognitive abilities, which is followed closely by stability periods.

This does not last because there are other step downs in abilities and then stability for a while, and so forth. This is what is called “stepwise” or “step-like progression.”

When your grandparent manages to catch vascular dementia in its early stage, he or she can come up with an effective treatment plan.

This will slow down the illness, preventing it from becoming worse at a fast rate.

Professional doctors have the know-how to identify the underlying cause of the illness.

The expert will come up with a healthy program you can use to reduce the risk of complications that may crop up in the future.

This might include a total change in lifestyle that will slow down the progression of the disease.

Most professionals will recommend that you get moving to increase your physical fitness and blood flow. Additionally, eat a balanced diet, get on a routine, and quit smoking and drinking alcohol.

On average, reports indicate that persons with vascular dementia will live for about five years after they detect the symptoms.

There are, however, many people who have lived for more than five years.

Lewy Body Dementia Stages: Early, Middle and Late Changes

Trevor Howitt Blog, Stages, Types January 15, 2021August 20, 2026dementia stages, LBD, lewy body dementia, lewy body dementia stages

Lewy body dementia stages from early to late progression

Understanding Lewy body dementia stages can help people living with the condition, family members and caregivers prepare for changes that may occur over time.

However, Lewy body dementia (LBD) does not progress in a perfectly predictable sequence. Symptoms can fluctuate from day to day and even within the same day, and two people with LBD may have very different experiences.

For this reason, early, middle and late stages are best viewed as a practical way of understanding progression rather than three official medical stages that everyone passes through in exactly the same way.

Below we explain how Lewy body dementia generally progresses, the changes that may occur during early, middle and later disease, and how care needs can change.

What Is Lewy Body Dementia?

Lewy body dementia is a progressive brain disorder associated with abnormal deposits of a protein called alpha-synuclein. These deposits are known as Lewy bodies.

According to the National Institute on Aging, Lewy bodies affect brain chemicals and can eventually cause problems with thinking, movement, behavior, mood, sleep and automatic body functions.

Lewy body dementia includes two closely related conditions:

Dementia with Lewy bodies (DLB), where cognitive symptoms develop before or around the same time as movement symptoms.
Parkinson’s disease dementia, where dementia develops after a person has been living with Parkinson’s disease and its movement symptoms.

As time passes, people with the two conditions may develop many of the same symptoms.

LBD usually begins in people aged 50 or older, although younger people can also develop it.

Common symptoms can include changes in attention and thinking, visual hallucinations, sleep disturbances, Parkinson’s-like movement symptoms, changes in mood and problems with automatic body functions such as blood pressure, digestion and bladder control.

You can read more about these in our guide to Lewy body dementia symptoms.

How Does Lewy Body Dementia Progress?

Lewy body dementia is progressive, which means symptoms generally become more significant over time.

One of the features that makes LBD different from many other conditions is cognitive fluctuation.

A person may appear relatively alert and capable at one time but become confused, sleepy or unable to concentrate later that day. They may then appear considerably better again.

These fluctuations do not necessarily mean the person has suddenly moved from one stage of dementia to another.

The speed of progression also varies considerably.

The National Institute on Aging reports that people with LBD live an average of about five to seven years from diagnosis, although the range can be approximately two to 20 years. Age, general health, symptoms and other medical conditions can all influence an individual’s course.

These figures are population averages and cannot predict how long any particular person will live.

Lewy Body Dementia Stages: A Practical Guide

There is no single universally accepted staging system that divides Lewy body dementia neatly into three clinical stages.

However, thinking in terms of early, middle and late changes can make it easier for families to understand increasing symptoms and care needs.

Importantly, symptoms can overlap between these stages.

Early Lewy Body Dementia

During early LBD, symptoms may be mild enough that the person remains largely independent.

Memory problems are not always the most noticeable early symptom. Difficulties with attention, problem-solving, planning and visuospatial abilities may be more prominent.

Possible early changes include:

Fluctuations in attention, concentration or alertness
Detailed visual hallucinations
REM sleep behavior disorder, where a person physically acts out dreams
Mild stiffness, slowness or other Parkinson’s-like movement changes
Changes in balance or walking
Excessive daytime sleepiness
Constipation or changes in bladder function
Dizziness when standing because of changes in blood pressure
Apathy or loss of initiative
Anxiety or depression
Changes in visual perception or judging distance

A person may still work, socialize and manage many everyday activities during this period.

However, some tasks such as managing finances, medications, appointments or driving may gradually become more difficult.

This can be a good time to establish a knowledgeable medical team, make the home safer and discuss future preferences while the person can participate fully in decisions.

The National Institute on Aging also recommends considering advance health care, legal and financial planning early rather than waiting until decision-making becomes more difficult.

Middle Lewy Body Dementia

As LBD progresses, difficulties with thinking and movement generally have a greater impact on everyday life.

The person may still be capable of many activities but require increasing supervision or assistance.

Changes may include:

More noticeable cognitive fluctuations and periods of confusion
Increasing difficulty planning or completing complex activities
More pronounced stiffness and slowness of movement
Problems with balance and an increased risk of falls
Increasing difficulty walking
Changes in speech or a softer voice
Difficulty swallowing
Delusions or paranoia
Hallucinations
Changes in mood or behavior
Increasing problems with blood pressure, constipation or incontinence
Greater daytime sleepiness or other sleep problems

Some people may still manage personal activities such as dressing, eating or bathing independently, while others require substantial help.

There is no fixed point at which independence suddenly disappears.

Occupational therapy can help identify ways to make everyday activities safer and easier, while physical therapy can assist with movement, balance and fall prevention.

Speech-language pathologists may help with speech and swallowing problems.

Late-Stage Lewy Body Dementia

During later Lewy body dementia, the person generally requires much more assistance with everyday activities.

According to the National Institute on Aging, people in the later stages may eventually depend entirely on others for care.

Possible changes include:

Severe problems with thinking and communication
Greater confusion and difficulty understanding surroundings
Significant muscle rigidity and reduced mobility
Frequent falls or inability to walk independently
Difficulty transferring between a bed, chair and other positions
Increasing dependence for dressing, bathing and toileting
More frequent bladder or bowel incontinence
Difficulty speaking clearly or speaking very softly
Difficulty chewing or swallowing
Increased choking or aspiration risk
Greater need for help with eating and drinking
Longer periods of sleep or reduced activity
Increasing dependence for medications and other daily needs

Care needs at this point can become substantial.

Equipment, home modifications, professional caregivers or residential care may eventually be needed depending on the person’s circumstances.

Swallowing problems deserve particular attention because food or liquid entering the lungs can lead to serious complications.

A speech-language pathologist can assess swallowing and advise on safer ways to eat and drink.

Palliative care may also become increasingly valuable. Palliative care focuses on comfort, symptoms, quality of life and ensuring that treatment reflects the person’s goals and preferences. It can be introduced alongside other medical treatment and does not need to wait until the final days of life.

Why Lewy Body Dementia Can Be Difficult to Stage

LBD progression is not always a straight downward line.

The Lewy Body Dementia Association describes unpredictable changes in concentration, alertness and attention as a characteristic feature of the disease.

A person might appear much more impaired one afternoon and function considerably better the following morning.

Different symptoms may also progress at different speeds.

For example, one person may develop significant movement problems relatively early while another may have little difficulty with movement for several years.

For this reason, caregivers should look at the person’s overall pattern of function rather than assuming that one particularly difficult day represents a permanent move into a new stage.

Sudden Changes Should Not Automatically Be Blamed on LBD

Although fluctuation is common, a sudden or major deterioration should still be discussed with a healthcare professional.

Infections, pain, dehydration, constipation, medication side effects, sleep problems and other medical conditions can cause sudden confusion or behavioral changes.

The National Institute on Aging advises reporting major changes in function, symptoms or behavior to the person’s doctor.

Some of these causes may be treatable.

An Important Medication Warning With Lewy Body Dementia

People with Lewy body dementia can be unusually sensitive to certain medications.

This is particularly important when hallucinations, delusions or agitation become more prominent.

The Lewy Body Dementia Association warns that some people with LBD can experience severe reactions to antipsychotic medications, including worsening confusion, heavy sedation and increased Parkinson’s-like symptoms.

Traditional antipsychotic medications can be particularly problematic.

Because of these sensitivities, medication choices should be made by a healthcare professional who understands Lewy body dementia.

Do not start, stop or alter prescription medication without discussing it with the person’s doctor.

Planning Care as Lewy Body Dementia Progresses

The amount of support needed usually increases as LBD progresses.

A comprehensive care team may include a primary care physician, neurologist, occupational therapist, physical therapist, speech-language pathologist, mental health professional and other specialists depending on the person’s symptoms.

The National Institute on Aging recommends preparing for future changes before they become urgent.

This may include:

reviewing home safety and fall risks
discussing driving when appropriate
planning for increasing assistance with daily activities
discussing future health care wishes
considering advance directives and health care decision-making arrangements
obtaining appropriate legal and financial advice
identifying home care or residential care options before they are urgently needed

The details of legal documents vary by location, so families should obtain appropriate local professional advice.

When to Contact a Doctor

Contact the person’s healthcare team if there is a significant or sudden change in their condition.

This is particularly important with:

repeated falls or fainting
new difficulty walking
choking or difficulty swallowing
sudden or severe confusion
new or dramatically worsening hallucinations or delusions
significant changes after starting or changing medication
fever or other signs of infection
behavior that places the person or others at risk

A sudden deterioration does not necessarily mean the dementia has rapidly progressed.

Closing Remarks

Understanding Lewy body dementia stages can help families anticipate how care needs may change, but no staging system can precisely predict an individual’s experience.

LBD is particularly variable because thinking, alertness, movement, sleep, behavior and automatic body functions can all change at different rates.

Early in the disease, many people remain relatively independent. As symptoms progress, increasing assistance is usually needed, and in later LBD some people become completely dependent on others for their daily care.

An early and accurate diagnosis is valuable because it allows the person and their family to build an appropriate care team, address medication sensitivities and plan ahead.

There is currently no cure for Lewy body dementia, but some symptoms can be treated or managed and supportive care can help maintain quality of life.

If you or someone you care for is experiencing symptoms of LBD, discuss them with a doctor familiar with dementia.