Study Identifies Key Diseases Linked to Diagnostic Errors

Importance of Accurate Diagnosis in Healthcare

A recent study focused on a extensive malpractice claims database to pinpoint diseases responsible for the majority of diagnostic errors. Accurate disease diagnosis is vital for healthcare systems globally, as misdiagnoses can lead to severe consequences for patients, including disability or death. A diagnostic error occurs when a diagnosis is completely missed, delayed without justification, or incorrectly identified. The impact of these errors is challenging to quantify, with estimates of misdiagnosis in the United States ranging from tens of thousands to several million annually. It is widely believed that most individuals will encounter a diagnostic error at some point in their lives. Acknowledging this issue, the World Health Organization (WHO) has called for further research to refine estimates and explore the underlying causes and potential solutions.

Research Overview

Dr. David Newman-Toker, director of the Armstrong Institute Center for Diagnostic Excellence, led a team that identified the most frequently misdiagnosed conditions. Their findings were published in the journal *Diagnosis*. The research utilized a comprehensive database of malpractice claims from the Controlled Risk Insurance Company, Ltd., comprising over fifty thousand closed claims. Among these, more than eleven thousand involved diagnostic errors. The team focused on cases that resulted in severe patient outcomes, such as permanent injury or death, narrowing the claims to approximately seven thousand.

Categories of Misdiagnosed Diseases

The study revealed that nearly three-quarters of the severe diagnostic errors fell into three primary categories: vascular events, infections, and cancer. Within these categories, fifteen specific diseases accounted for almost half of the errors leading to significant harm. Stroke was identified as the leading condition among vascular events, while sepsis topped the list for infections, and lung cancer was the most common misdiagnosed cancer. The analysis also indicated that failures in clinical judgment contributed to over 85% of the misdiagnosed cases, with a majority occurring in ambulatory settings. Diagnostic errors related to infections and strokes were more prevalent in emergency departments, whereas cancer misdiagnoses were primarily associated with outpatient clinics.

Implications for Future Research

These findings are instrumental in highlighting areas within clinical practice that require targeted interventions to mitigate the risk of diagnostic errors. The study underscores the necessity for healthcare systems to enhance bedside diagnostic decision-making among clinicians. This research marks the initial phase of a three-part project. The subsequent phase will estimate the frequency of misdiagnoses within the identified “big three” categories. The final phase aims to determine the annual number of individuals affected by diagnostic errors in the United States.

References

Johns Hopkins Medicine. Johns Hopkins Medicine Researchers Identify Health Conditions Likely to be Misdiagnosed. https://www.hopkinsmedicine.org/news/newsroom/news-releases/johns-hopkins-medicine-researchers-identify-health-conditions-likely-to-be-misdiagnosed

Newman-Toker, D. E., Schaffer, A. C., Yu-Moe, C. W., Nassery, N., Saber Tehrani, A. S., Clemens, G. D., Wang, Z., Zhu, Y., Fanai, M., & Siegal, D. (2019). Serious misdiagnosis-related harms in malpractice claims: The “Big Three” – vascular events, infections, and cancers. Diagnosis.

Singh, H., Schiff, G. D., Graber, M. L., Onakpoya, I., & Thompson, M. J. (2017). The global burden of diagnostic errors in primary care. BMJ Quality and Safety. 26(6), 484-494.