03. Diagnosis, Decision-Making, and Reasoning – 101


The core competencies in this domain are:

  1. Integrates and synthesises knowledge to make decisions in complex clinical situations.
  2. Modifies differential diagnoses based on clinical course and other data as appropriate.
  3. Demonstrates diagnostic accuracy; this does not require the correct diagnosis, but that the direction of reasoning was appropriate and accurate.
  4. Collects/reports clinical information in a hypothesis-driven manner.
  5. Articulates an appropriate problem definition.
  6. Formulates a rational list of differential diagnoses, including most likely, less likely, unlikely, and cannot miss diagnoses.
  7. Directs evaluation and treatment towards high-priority diagnoses.
  8. Demonstrates metacognition (thinking about own thinking).

To excel a GP candidate needs to demonstrate a nuanced and sophisticated approach to the diagnostic process. This competency involves several critical elements that ensure effective decision-making in the face of complex clinical presentations.

How to Demonstrate Diagnosis, Decision-Making, and Reasoning

  1. Integrates and Synthesises Knowledge to Make Decisions in Complex Clinical Situations
    • Clinical Integration: Is the ability to combine and synthesize knowledge from various domains, including medical sciences, patient history, and current clinical findings, to inform decision-making.
    • Contextual Decision-Making: Applying this integrated knowledge in the context of individual patient circumstances, such as considering patient preferences, socioeconomic factors, and comorbidities in their decision-making process.
  2. Modifies Differential Diagnoses Based on Clinical Course and Other Data as Appropriate
    • Adaptive Reasoning: This involves showcasing flexibility in thinking by updating or modifying the differential diagnoses as new information becomes available or as the patient’s condition evolves.
    • Data Responsiveness: Effectively using ongoing assessments, test results, and specialist consultations to refine diagnostic hypotheses.
  3. Demonstrates Diagnostic Accuracy
    • Sound Clinical Judgement: While not always arriving at the correct diagnosis initially, the reasoning process should be logical, systematic, and based on valid clinical evidence.
    • Reflective Practice: Demonstrating the ability to reflect on the diagnostic process and outcomes to learn from errors or successes.
  4. Collects/Reports Clinical Information in a Hypothesis-Driven Manner
    • Focused Gathering: Efficiently collecting clinical data that is most relevant to confirming or refuting potential diagnoses based on initial hypotheses.
    • Structured Reporting: Organizing and presenting information in a way that clearly supports or challenges these initial hypotheses.
  5. Articulates an Appropriate Problem Definition
    • Clear Problem Statement: Formulate a clear and concise statement of the main clinical problems or questions that need to be addressed.
    • Relevance to Care: Ensuring that the problem definition directly informs and impacts the clinical management plan.
  6. Formulates a Rational List of Differential Diagnoses
    • Comprehensive and Structured: Developing a list that includes a range of potential diagnoses categorized by likelihood and urgency, such as ‘most likely’, ‘less likely’, ‘unlikely’, and ‘cannot miss’ conditions.
    • Evidence-Based: These categorizations are based on current medical evidence and clinical guidelines.
  7. Directs Evaluation and Treatment Towards High-Priority Diagnoses
    • Prioritization Skills: Effectively prioritizing which conditions to rule out first based on potential risk to the patient.
    • Resource Allocation: Allocating medical resources and investigations in a manner that is most likely to confirm critical diagnoses quickly and efficiently.
  8. Demonstrates Metacognition (Thinking About Own Thinking)
    • Self-Awareness in Clinical Reasoning: Regularly assessing their own thought processes and decisions to identify potential biases or gaps in knowledge.
    • Continuous Improvement: Engaging in continuous professional development and learning to enhance their diagnostic skills and reasoning capabilities.

By mastering these aspects, a GP candidate not only shows their ability to handle the complexities of diagnosis and clinical decision-making but also illustrates a deep commitment to patient-centred care. This involves a balanced approach of applying scientific knowledge, considering patient values, and constantly evaluating their own thinking and decisions, which is fundamental to the practice of modern medicine.