Managing uncertainty in general practice
Core concept
- Uncertainty is normal in general practice
- Patients often present early in illness.
- Symptoms may be vague, evolving or non-specific.
- Examination findings may be unclear.
- Investigation results may be conflicting or not diagnostic.
- In GP, diagnosis often develops over time rather than in one consultation.
Why uncertainty happens in GP
1. Medicine is inherently uncertain
- Not all disease processes are fully understood.
- Evidence and guidelines change over time.
- Some symptoms do not fit neatly into a single diagnosis.
2. Patients present early
- Early symptoms may be non-specific.
- Red flags may not be present initially.
- The illness pattern may only become clear with time.
3. GP differs from hospital medicine
- Hospital presentations are often more acute and clearer.
- Hospitals have immediate access to extensive testing.
- GP consultations are shorter, community-based and often involve independent decision-making.
- GP registrars often need time to adjust from hospital-style diagnostic certainty to GP-style uncertainty.
Potential harms of poorly managed uncertainty
Defensive medicine and over-testing
- Fear of missing serious disease can lead to excessive “just in case” investigations.
- This may cause:
- unnecessary invasive investigations
- radiation exposure
- false positives
- investigation cascades
- overdiagnosis
- unnecessary or harmful treatment
- financial cost to the patient
- patient burden from repeated tests and appointments
Patient distress
- Patients may feel:
- anxious about serious disease
- frustrated without a clear diagnosis
- unable to explain symptoms to family/work
- invalidated if no diagnosis is given
- blocked from accessing supports or services
GP distress
- GPs may feel:
- frustrated
- helpless
- less confident
- pressured to order tests or prescribe treatments
Use of non-evidence-based treatments
- If patients feel dissatisfied, they may seek alternative therapies with limited evidence.
- This can delay appropriate care and expose them to harm.
GP stress and burnout
- Poor tolerance of uncertainty can contribute to stress and burnout, particularly for GP registrars.
How to manage uncertainty safely
1. Communicate openly
Use clear language:
- “At this stage, the diagnosis is not completely clear.”
- “There are no red flags today, which is reassuring.”
- “Some conditions declare themselves over time.”
- “The safest approach is to monitor this carefully and review if symptoms change.”
2. Identify the patient’s agenda — ICE
Ask about:
Ideas
- “What do you think might be causing this?”
Concerns
- “What are you most worried this could be?”
Expectations
- “What were you hoping we could do today?”
This helps target the consultation to the patient’s real concern.
Explaining uncertainty to patients
Explain:
- the diagnosis is not clear yet
- what serious diagnoses have been considered
- what makes serious disease less likely today
- why immediate testing may or may not be useful
- why watchful waiting may be safer than over-testing
- what symptoms should trigger urgent review
- when planned follow-up should occur
- how symptoms can be managed in the meantime
Safety-netting
Essential components
Always document:
- working diagnosis or differential diagnosis
- red flags discussed
- what symptoms require urgent review
- when to return
- when to go to ED
- planned follow-up timeframe
Example safety-netting script
- “Please seek urgent medical review or attend ED if you develop chest pain, shortness of breath, fainting, severe worsening pain, fever, neurological symptoms, persistent vomiting, bleeding, confusion, or if you feel significantly worse.”
Validate the patient’s symptoms
Important messages:
- symptoms are real
- symptoms can be distressing even without a clear diagnosis
- uncertainty does not mean the doctor is dismissing the problem
- some conditions take time to diagnose
- tests can exclude serious disease but may not always identify the cause
Example:
- “I believe your symptoms are real and I can see they are affecting you. At the moment, we do not have a clear single diagnosis, but we can keep working through this safely.”
Clinical review approach
History
- Take a comprehensive history.
- Repeat and update the history at follow-up.
- Ask about:
- onset
- progression
- associated symptoms
- functional impact
- red flags
- psychosocial context
- medications
- past investigations
- patient concerns
Examination
- Perform a focused but appropriate examination.
- Re-examine if symptoms change or persist.
Red flags
- Actively look for features suggesting serious disease.
- If red flags are present, escalate appropriately.
Investigations: key principle
Ask: “Will this test change management?”
- If the result will not change management, avoid ordering the test.
- Avoid testing purely for reassurance if the pre-test probability is low.
- Explain false positives and investigation cascades to the patient.
Example:
- “Doing a test when the chance of disease is very low can sometimes create more harm than benefit, because abnormal results can occur by chance and lead to more unnecessary tests.”
Management while diagnosis is uncertain
Symptom management
- Provide safe symptom relief.
- Avoid unnecessary long-term medication.
- Review response to treatment.
Practical support
- Consider:
- medical certificate
- workplace adjustment
- home supports
- allied health input
- functional assessment
Lifestyle and preventive care
- Continue evidence-based preventive care.
- Address:
- sleep
- activity
- diet
- alcohol/smoking
- mental health
- chronic disease management
Psychological impact
- Ask about anxiety, mood, fear and coping.
- Consider psychology referral if symptoms are distressing or persistent.
When to refer
Consider referral when:
- red flags are present
- symptoms are progressive
- diagnosis remains unclear despite appropriate assessment
- specialist input will change management
- multidisciplinary care is needed
- patient function is significantly impaired
Referral can also help identify patterns not obvious from a single GP perspective.
Follow-up and review
At follow-up:
- reassess symptoms
- repeat focused examination if needed
- check for new red flags
- review test results
- reconsider differentials
- assess function
- assess mental health impact
- update the management plan
Important principle:
- Uncertainty should be actively managed, not ignored.
Clinical reasoning tools
Useful GP strategies:
Restricted rule-out
- Consider serious conditions that must not be missed.
- Rule out the dangerous diagnoses first.
Clinical prediction rules
- Use validated tools where appropriate.
Diagnostic pause
- Stop and reconsider:
- “What else could this be?”
- “Is there a red flag?”
- “Am I being falsely reassured?”
- “Am I over-testing due to anxiety?”
Gut feeling
- Pay attention to clinical intuition, especially if something feels wrong.
- Use it as a prompt to reassess, not as a diagnosis.
Test of time
- Careful observation with planned review.
- Appropriate only when no red flags and patient is safe.
Practical GP consultation structure
1. Acknowledge
- “I can see this is worrying you.”
2. Assess
- History, examination, red flags, risk factors.
3. Explain
- “The diagnosis is not clear yet, but there are reassuring features.”
4. Decide
- Shared decision-making about tests, treatment or review.
5. Safety-net
- Clear written/verbal return advice.
6. Review
- Planned follow-up and reassessment.
Key points
- Uncertainty is common and acceptable in GP.
- Unsafe uncertainty is when there is no plan, no safety-net and no follow-up.
- Do not over-investigate just to reduce clinician anxiety.
- Use shared decision-making.
- Validate symptoms even when diagnosis is unclear.
- Always document:
- differential diagnosis
- red flags considered
- safety-net advice
- follow-up plan
- rationale for not testing, if relevant