How can families prepare for a dementia assessment? 

A dementia assessment is a comprehensive clinical process that requires active participation from both the individual and their family members. In a clinical setting, doctors rely heavily on collateral history: the observations and insights provided by those who know the patient best, to form an accurate picture of cognitive and behavioural changes. Because many symptoms can be subtle or fluctuate throughout the day, families play a vital role in documenting the evidence needed for a formal diagnosis. 

Preparing effectively for the assessment can reduce stress and ensure that the clinical team has all the necessary information to distinguish between different types of dementia or other treatable medical conditions. This guide outlines the practical steps families can take to gather information, coordinate with medical professionals, and support their loved one through the diagnostic pathway. 

what we will discuss in this article 

• Creating a detailed symptom diary and timeline 

• The importance of gathering collateral history from family members 

• Organizing medical records and current medication lists 

• Preparing the individual for cognitive testing and physical exams 

• Essential questions to ask the GP or specialist during the appointment 

• Legal and practical considerations before the assessment 

• emergency guidance for identifying signs of health deterioration 

Documenting changes: The symptom diary 

One of the most valuable tools you can bring to an assessment is a written record of your observations. 

A symptom diary helps clinicians understand the frequency and severity of problems. Instead of general statements like they are getting forgetful, aim for specific examples. Note down when the person became lost in a familiar place, if they are repeating the same question multiple times an hour, or if you have noticed a change in their personality or social filter. This record should also include any fluctuations in alertness, as this can be a key indicator for certain types of dementia like Lewy body dementia. 

Gathering collateral history 

A collateral history is a medical term for the information provided by family, friends, or carers about the patient’s condition. 

Doctors often ask family members to speak separately from the patient to allow for an honest discussion of symptoms that the individual may not be aware of or may feel embarrassed about. Before the appointment, talk to other family members to see if they have noticed different changes. For instance, a grandchild might notice a loss of vocabulary that a spouse has missed because they have unconsciously adapted their own speech to compensate. 

Organizing medical and medication data 

To rule out other causes of confusion, the clinical team needs to review the person overall health and current treatments. 

• Current Medications: Bring a complete list of all prescriptions, over the counter medicines, and supplements. Some medications can cause side effects that mimic dementia symptoms. 

• Medical History: Be prepared to discuss long term conditions such as high blood pressure, diabetes, or previous strokes, as these are critical for identifying vascular dementia. 

• Family History: Note if any close relatives were diagnosed with dementia, particularly if they were under the age of 65 at the time. 

Comparison of assessment preparation steps 

Preparation Task	Why It Is Important	Clinical Value
Symptom Diary	Captures real world examples	Provides evidence of functional decline
Medication List	Identifies potential drug interactions	Rules out medication induced confusion
Collateral History	Provides a baseline for personality	Highlights changes the patient may lack insight into
Questions List	Ensures all concerns are addressed	Clarifies the next steps in the care pathway
GPCOG/MMSE Awareness	Reduces anxiety about testing	Helps the person stay calm during assessment

Supporting the individual 

The prospect of a dementia assessment can be frightening for the person experiencing symptoms, leading to defensive behaviour or a refusal to attend. 

It is often helpful to frame the appointment as a general health review or a checkup for a specific concern like sleep or blood pressure. Ensure the person is well rested and has any necessary hearing aids or glasses with them, as sensory impairment can lead to unfairly low scores on cognitive tests. During the assessment, allow the person to answer for themselves as much as possible, only stepping in if they are clearly struggling or providing inaccurate information. 

To summarise 

Preparation is the key to a successful dementia assessment. By documenting specific symptoms in a diary, gathering a shared history from the wider family, and organising medical information, you provide the clinical team with the data they need to make an accurate diagnosis. Supporting your loved one through this process with patience and clarity ensures that the assessment is as stress free as possible, paving the way for the right medical and social support to be put in place. 

emergency guidance 

While a dementia assessment is a scheduled event, sudden changes in behaviour or health are medical emergencies. Call 999 or seek immediate clinical help if the person experiences a sudden onset of extreme confusion, a loss of speech, or a sudden change in physical coordination or strength. These can be signs of a stroke or a severe infection like a urinary tract infection, which in older adults can cause a rapid decline in mental state known as delirium. Any rapid change that occurs over hours or days is an emergency and must be assessed by a clinical team immediately to prevent permanent damage. 

Authority Snapshot 

Dr. Rebecca Fernandez is a UK trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence based approaches such as CBT, ACT, and mindfulness based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well being in 2026.