What stage of dementia is my loved one in? A guide to dementia staging tools
The Definition of Dementia
Before discussing the stages of dementia, it is important to understand what dementia is—and what it is not.
Dementia is not a specific disease. Rather, it is an umbrella term used to describe a collection of symptoms caused by diseases that damage the brain. Many different diseases fall under the category of dementia, including Alzheimer's disease, Vascular Dementia, Frontotemporal Dementia, and Lewy Body Dementia. Each type of dementia affects the brain differently and may cause different symptoms, patterns of progression, and care needs.
One important thing to note about dementia staging tools is that they are only guides. Most people do not progress through dementia in exactly the same way. Some people advance through stages much more quickly than others, while some may appear to skip certain stages altogether. A doctor or neurologist may use one of these staging tools to estimate where your loved one is in the disease process, but that does not mean they will experience every symptom associated with that stage. Dementia progression is highly individualized, and staging tools cannot predict exactly how a person's journey will unfold.
Three Dementia Stages
One of the most common ways dementia is categorized is by dividing it into three stages: early, middle, and late. These stages are also sometimes referred to as mild, moderate, and severe dementia.
Early-Stage Dementia
A person in the early stage of dementia is beginning to experience symptoms that interfere with everyday life. This might include forgetting to pay bills, getting lost while driving to familiar places, or forgetting the name of a longtime friend. People in this stage are often still able to live independently but may begin to need additional support. Medication reminders, assistance with finances, and organizational systems may be beneficial.
Common symptoms may include:
Short-term memory loss: Forgetting newly learned information, important dates, or recent conversations. They may ask the same questions repeatedly.
Difficulty planning and organizing: Tasks such as following a recipe, managing finances, or completing multiple-step activities become more challenging.
Losing track of time: They may become confused about the date, season, or passage of time.
Impaired judgment: They may make poor decisions, such as wearing inappropriate clothing for the weather or leaving the stove on.
Social withdrawal: They may begin withdrawing from hobbies, social activities, or conversations that have become difficult to follow.
Middle-Stage Dementia
A person in the middle stage of dementia is likely experiencing more significant cognitive changes and requires increased assistance with daily activities. Tasks such as cooking, cleaning, laundry, dressing, and medication management often require support. By this stage, it is generally unsafe for the person to drive or live alone.
Additional symptoms may include:
Increasing memory loss: They may have difficulty recalling important personal events, recent conversations, or significant life experiences.
Communication difficulties: They may struggle to find the right words, have a smaller vocabulary, or have difficulty understanding others.
Sleep disturbances: Sundowning behaviors may increase, and the sleep-wake cycle may become disrupted.
Paranoia or delusions: They may develop false beliefs, such as thinking someone is stealing from them or trying to harm them.
Confusion about time and place: They may not know where they are, what day it is, or why they are in a particular location.
Late-Stage Dementia
A person in the late stage of dementia often requires 24-hour supervision and hands-on care. Everyday activities such as toileting, dressing, eating, and mobility become increasingly difficult. Many people require assistance with all activities of daily living.
Common symptoms may include:
Loss of speech: Eventually, some people lose the ability to communicate verbally.
Lack of recognition: They may stop recognizing familiar people, including spouses, children, siblings, friends, and caregivers.
Incontinence: Loss of bladder and bowel control becomes common.
Sleeping more: They may spend increasing amounts of time asleep and become less alert when awake.
Swallowing difficulties: Problems with chewing and swallowing may develop, increasing the risk of choking and aspiration pneumonia.
Frequent infections: Some people experience recurrent infections, such as urinary tract infections or pneumonia.
Loss of mobility: Walking may become difficult or impossible as the disease progresses.
The Global Deterioration Scale (GDS)
The Global Deterioration Scale (GDS) is a clinical assessment tool used to measure cognitive decline and dementia progression.
Stage 1: No Cognitive Decline
No evidence of cognitive impairment or memory loss.
Stage 2: Very Mild Cognitive Decline
Normal forgetfulness, such as misplacing objects. No significant deficits are identified during clinical assessment.
Stage 3: Mild Cognitive Decline
Early noticeable deficits begin to appear, such as getting lost or struggling with complex tasks.
Stage 4: Moderate Cognitive Decline
Clear deficits become apparent. People in this stage often struggle with tasks such as managing finances or traveling independently.
Stage 5: Moderately Severe Cognitive Decline
People in this stage can no longer live independently without assistance. They may struggle to recall personal information such as their address or phone number but can often still remember the names of close family members.
Stage 6: Severe Cognitive Decline
Significant assistance is required for activities of daily living. Sleep disturbances, delusions, paranoia, and agitation may occur.
Stage 7: Very Severe Cognitive Decline
Verbal and motor abilities are progressively lost. People in this stage eventually lose the ability to walk, speak, and care for themselves, requiring total assistance.
Functional Assessment Staging Tool (FAST Scale)
The Functional Assessment Staging Tool, commonly known as the FAST Scale, is a clinical tool that separates dementia progression into seven stages, many of which contain substages. Unlike the GDS, the FAST Scale focuses on functional abilities rather than memory loss or performance on cognitive tests. Because it focuses on daily functioning, it is commonly used to assess progression across many different types of dementia.
Stage 1: Normal Aging
No functional deficits.
Stage 2: Possible Mild Cognitive Impairment
Mild functional changes may be present.
Stage 3: Mild Cognitive Impairment
Difficulties begin to interfere with a person's most complex tasks.
Stage 4: Mild Dementia
Functions such as cooking, cleaning, paying bills, and traveling independently become impaired.
Stage 5: Moderate Dementia
Dressing becomes difficult, particularly choosing weather-appropriate clothing.
Stage 6: Moderately Severe Dementia
6a: Needs help dressing.
6b: Needs help bathing.
6c: Needs help toileting.
6d: Urinary incontinence.
6e: Bowel incontinence.
Stage 7: Severe Dementia
7a: Speaks six or fewer words per day.
7b: Speaks only one recognizable word.
7c: No longer able to walk independently.
7d: No longer able to sit up without assistance.
7e: No longer able to smile.
7f: No longer able to hold up their head.
Dementia Behavioral Assessment Tool (DBAT)
The Dementia Behavioral Assessment Tool (DBAT) is an observational checklist often used by caregivers and healthcare professionals to measure dementia progression. It separates dementia into seven stages based on behavioral and functional changes commonly seen as the disease progresses. You can download a printable version of the checklist here.
Level 1: Normal Aging
No significant cognitive or functional impairment.
Level 2: Mild Cognitive Impairment
Mild memory lapses may be noticeable, but the person remains highly independent.
Level 3: Mild Dementia
Difficulty with complex tasks, such as managing finances or planning activities.
Level 4: Moderate Dementia
More significant memory deficits develop, including forgetting recent events and aspects of personal history.
Level 5: Moderately Severe Dementia
The person may become disoriented to time and place. They often struggle with selecting and putting on clothing appropriately. Wandering, collecting items, and needing verbal cues to complete tasks become more common.
Level 6: Late-Stage Dementia
The person is unable to recall many recent events. They may struggle to dress appropriately, resist changing clothes, and begin experiencing bowel and bladder incontinence.
Level 7: End-Stage Dementia
The person has little to no speech, cannot feed themselves independently, and may pocket food in their cheeks instead of swallowing. They sleep more, are less alert, and require complete assistance with daily care.
Final Thoughts
Families often ask, "What stage of dementia is my loved one in?" While staging tools can provide helpful guidance, it is important to remember that dementia does not follow a perfectly predictable path.
Two people with the same diagnosis may experience very different symptoms, progress at different rates, and require different levels of support. Rather than focusing solely on a stage number, it is often more helpful to focus on your loved one's current abilities, challenges, and care needs.
Understanding dementia staging can help families prepare for future changes, access appropriate resources, and make informed decisions about care. However, every person's dementia journey is unique, and staging tools should be viewed as guides rather than strict rules.
