The AHRQ review, issued on Dec. 15, 2022, stated that the findings of their study translate “to about 1 in 18 emergency department patients receiving an incorrect diagnosis, 1 in 50 suffering an adverse event, and 1 in 350 suffering permanent disability or death.” The authors describe these rates as similar to those seen in primary care and inpatient hospital settings.
The review was conducted through an Evidence-Based Practice Center as part of AHRQ’s Effective Health Care Program. The authors included data from 279 studies in the review. They identified the five most frequently misdiagnosed conditions in the ED as stroke, MI, aortic aneurysm and dissection, spinal cord compression and injury, and venous thromboembolism.
The authors noted that, given an estimated 130 million ED visits in the United States each year, the overall rate of incorrect diagnoses in the ED is approximately 5.7% and that 2.0% of the patients whose conditions were misdiagnosed suffer an adverse event as a result. On a local level, the authors estimate that an average ED with approximately 25,000 visits per year could experience 1,400 diagnostic errors, 500 diagnostic adverse events, and 75 serious harms, including 50 deaths. However, the authors noted that the overall error and harm rates were based on three studies from outside the United States (Canada, Spain, and Switzerland) and that only two of these were used to estimate harms.
“It’s imperative that we, as emergency physicians, inform the public that the AHRQ report used flawed methodology and statistics that extrapolated – and therefore overstated – the potential for harm when receiving care in US emergency departments,” Robert Glatter, MD, an emergency medicine physician at Lenox Hill Hospital at Northwell Health and an assistant professor at Hofstra University, Hempstead, N.Y., said in an interview.
Emergency medicine organizations express concerns for accuracy
The American College of Emergency Physicians and eight other medical organizations representing emergency medicine in the United States sent a letter to the AHRQ on Dec. 14, 2022, spelling out their concerns. The review was conducted as part of the AHRQ’s ongoing Effective Health Care Program, and the organizations had the opportunity to review a draft before it was published. On reading the review, they asked that the publication of the review be delayed. “After reviewing the executive summary and initial draft, we believe that the report makes misleading, incomplete, and erroneous conclusions from the literature reviewed and conveys a tone that inaccurately characterizes and unnecessarily disparages the practice of emergency medicine in the United States,” the organizations wrote in their letter.
The concerns of the emergency medicine organizations fell into four categories: misrepresentation of the practice and nature of emergency medicine; applicability of references cited; inaccurate interpretation of malpractice data; and the reporting of a single overall diagnostic error rate of 5.7% in EDs.
The practice of emergency medicine is variable and unique among specialties in that the focus is less about the final diagnosis and more about immediate identification and treatment of life-threatening conditions, according to the letter.
Notably, many of the studies cited did not mention whether the patient’s final diagnosis was apparent on admission to the ED. “Without this knowledge, it is completely inappropriate to label such discrepancies as ‘ED diagnostic error,’ ” the organizations wrote.
All medical specialties have room for improvement, but the current AHRQ review appears not to identify these opportunities, and instead of contributing to a discussion of improving patient care in the ED, it may cause harm by presenting misinformation, they said.