The Expert Clinician

By Adam Widdison, author of The Expert Clinician

My work explores how we can shape the consultation so that it remains relevant to both the patient and the rapidly changing world of modern healthcare.

In my previous post, Understand the Person through their Lifestyle, I explored how understanding a patient’s lifestyle—their circumstances, relationships, occupation and daily choices—helps us see the person behind the diagnosis.

However, understanding how someone lives is only part of the picture.

Two patients with the same diagnosis may experience their illness very differently. One may continue working, exercising and enjoying life, while another may find that the same condition affects every aspect of daily life.

Understanding that difference is fundamental to person-centred care.

In this post, we’ll explore how a patient’s quality of life and functional performance shape clinical reasoning, management and shared decision-making.

What Do We Mean by Quality of Life and by Functional Performance?

Quality of life means seeing the world through the patient’s eyes.

It reflects how individuals experience their lives—how well they feel, how satisfied they are, and whether they are able to live in a way that is meaningful to them.

Ultimately, the patient is the expert. No questionnaire or scoring system can fully capture their quality of life.

Functional performance is closely related yet distinct.

It describes what a patient is actually able to do—from basic self-care and everyday activities to complex professional, physical or cognitive tasks.

Quality of life and functional performance are closely linked. For many people, quality of life depends less on the diagnosis itself than on whether they can continue to do the things that matter most to them.

Performance must always be considered within the context of the patient’s life. An elite athlete, a parent caring for young children, and someone living independently in later life may all judge the same limitation very differently.

An important part of clinical reasoning is also estimating future potential—what the patient may realistically achieve through treatment, rehabilitation or lifestyle change—and recognising the likely consequences if no intervention is undertaken.

Why Does This Matter?

For many patients, quality of life and functional performance become particularly important when illness begins to interfere with daily life.

Exploring these issues demonstrates genuine interest in the person rather than merely in the disease. It also strengthens rapport and helps patients feel heard.

Most patients appreciate the opportunity to explain how their illness has affected their lives.

Understanding quality of life and functional performance is particularly valuable in the following circumstances:

• Symptoms significantly affect daily activities.
• Considering different management options, priorities, or timing.
• Patients need to weigh the risks and benefits of treatment.

It also helps clinicians avoid unnecessary investigations or interventions when the potential burden outweighs the likely benefit, while ensuring that management plans remain realistic and centred on what matters most to the individual.

Exploring Quality of Life During the Consultation

The consultation often provides the first clues.

The patient’s opening comments, tone of voice, facial expression and body language all provide valuable insight into how they are coping.

When illness appears to be affecting quality of life, a few simple, open questions often reveal far more than any questionnaire can.

For example:

What effect is this having on you right now?

What has it prevented you from doing?

Patients often find it easier to compare their current situation with how life was before their illness.

Questions such as:

How has your life changed?

What could you do before that you can’t do any more?

These conversations help clinicians understand not only the impact of disease but also what matters most to the individual.

Assessing Functional Performance

The way a patient enters the room, including their gait, posture and general demeanour, often provides the first clues to their functional performance.

Equally revealing is the early conversation. Understanding how patients spend their time offers valuable insight into their abilities, motivation and priorities. Someone working as a full-time carer, performing a physically demanding job, or exercising regularly demonstrates a very different level of function from someone who is unable to leave the house.

When further exploration is needed, simple open questions are often the most informative.

What limits you?

Could you do more if you wanted to?

What stops you from doing more?

These questions help distinguish between physical limitations, psychological barriers and social circumstances that may be restricting performance.

For some patients, assessment focuses on the essentials of daily living—washing, dressing, feeding, walking, climbing stairs or maintaining continence.

For others, particularly those with active professional or personal lives, the focus may be very different. The consultation may need to address:

• Ability to work.
• Driving.
• Exercise and physical endurance.
• Walking distance.
• Strength, stamina and coordination.
• Cognitive performance.
• Participation in family, social and community life.

The assessment should always reflect what matters most to the individual patient rather than following a standard checklist.

Looking Beyond Today’s Performance

Current ability is only part of the story.

Clinical reasoning also involves understanding how performance has changed and what may be possible.

Questions such as:

How has your life changed?

What could you do before?

help establish whether the function is improving, deteriorating, or likely to respond to treatment.

This perspective allows clinicians to judge not only where the patient is today, but also where they might realistically be after treatment, rehabilitation or lifestyle changes.

When considering future potential, factors such as cognition, motivation, social support, comorbidity, treatment effectiveness and irreversible disease all influence what can realistically be achieved.

Understanding these influences helps clinicians and patients set realistic goals and make shared decisions based on achievable outcomes rather than on unrealistic expectations.

Using Objective Measures

For most patients, thoughtful observation and conversation provide all the information required.

In more complex situations, however, validated assessment tools can provide additional structure and help to monitor progress over time.

Examples include:

• Functional Independence Measure – commonly used after stroke or spinal cord injury.
• Clinical Frailty Scale – helps predict outcomes in older adults.
• Barthel Index – measures independence in activities of daily living.
• Charlson Comorbidity Index – estimates the impact of comorbidities.

Physiological tests, including cardiopulmonary exercise testing, pulmonary function tests and cardiac stress testing, may also help quantify functional capacity when this will influence clinical management.

These tools should always support—rather than replace—clinical judgement.

Scores are most meaningful when interpreted in the context of the individual patient’s life.

In complex, chronic or palliative conditions, additional support from specialist nurses, therapists or counsellors may offer valuable insight into functional ability and quality of life.

Management Implications

Understanding a patient’s quality of life and functional performance is not merely about describing their current situation—it helps shape realistic, personalised care.

For some patients, relatively simple lifestyle changes, such as increasing physical activity, stopping smoking, improving diet or achieving a healthier weight, can significantly improve both function and quality of life.

For others, particularly those living with chronic or progressive illness, the goal may not be to restore previous levels of function but to maintain independence, preserve dignity and slow further decline.

The consultation provides an opportunity to identify what matters most to the patient and to develop management plans that reflect their priorities rather than simply treating disease.

Recognising these differences enables clinicians and patients to make informed, shared decisions grounded in realistic goals and achievable outcomes.

Take-Home Message

Quality of life means seeing the world through the patient’s eyes.

Two patients with the same diagnosis may experience their illness in completely different ways. Understanding how illness affects what they value, what they can do and what they hope to achieve offers insights that no investigation or scoring system can provide.

By thoughtfully exploring quality of life and functional performance, we strengthen therapeutic relationships, improve clinical reasoning and develop management plans that are both realistic and genuinely person-centred.

Ultimately, excellent clinical care is not measured simply by how accurately we diagnose disease, but by how well we understand the person living with it.

In my next blog, I’ll explore how patients’ beliefs, hopes, fears and expectations shape consultations and influence clinical decision-making.

I’d love to hear your thoughts.

How do you assess the impact of illness on a patient’s quality of life?

Have you found that understanding what matters most to the individual has changed your management decisions?

Please share your experiences in the comments below.

These ideas are explored further in The Expert Clinician: Bridging the Clinical Divide. If you’re interested in developing a more adaptive, patient-centred approach, you can read more here: 

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