Common Inpatient Cognitive Errors in Diagnosis and Clinical Reasoning: Practical Applications for the Hospitalist-Slides

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This presentation by Dr. Daniel Restrepo at Society of Hospital Medicine Converge 2024 focuses on cognitive errors in medical diagnosis within hospital medicine, emphasizing practical applications to reduce misdiagnosis. Misdiagnosis is common (10-40% of cases), costly, and carries high morbidity, mortality, and legal risk.<br /><br />Key concepts include heuristics—mental shortcuts like representativeness and availability—that aid but also bias clinical reasoning. Representativeness heuristic involves pattern matching a diagnosis to typical presentations, sometimes ignoring actual disease prevalence (base rate neglect). Availability heuristic leads clinicians to overestimate likelihood of diagnoses they recently encountered, sometimes missing other causes.<br /><br />Several cognitive biases contribute to diagnostic errors: anchoring (fixating on initial info), premature closure (settling on a diagnosis early), confirmation bias (favoring info confirming initial ideas), framing effects (influenced by presentation of information), diagnosis momentum (unquestioned acceptance of previous labels), and search satisfying (stopping after finding the first plausible diagnosis).<br /><br />Real cases illustrate these biases. For example, a middle-aged woman with abnormal liver enzymes was initially misdiagnosed with autoimmune hepatitis due to pattern recognition, despite the more common diagnosis of gallstone-related obstruction. Another case showed COPD diagnosis anchoring, missing alternative cardiac causes of dyspnea. A third case involved premature closure on urinary tract infection, delaying recognition of medication side effects and kidney injury.<br /><br />Mitigation strategies emphasize the "effortful pause"—a deliberate, critical reassessment asking what doesn’t fit and what might be missing. Other approaches include playing the odds by considering disease prevalence, using diagnostic frameworks or checklists for common presentations, working in teams for diverse perspectives, and thorough documentation that captures diagnostic reasoning. Longitudinal follow-up is essential to calibrate initial judgments and recognize evolving diagnoses.<br /><br />Ultimately, Dr. Restrepo advocates for hospitalists to be skeptical, reflective, and collaborative clinicians who actively counteract cognitive biases to improve diagnostic accuracy and patient outcomes.

Keywords

cognitive errors

medical diagnosis

hospital medicine

misdiagnosis

heuristics

representativeness heuristic

availability heuristic

cognitive biases

diagnostic errors

mitigation strategies