• David Arastehmanesh, Alyssa Mangino, Nadia Eshraghi, Richard E Wolfe, and Shamai A Grossman.
• Department of Emergency Medicine, Harvard Medical School, Beth Israel Deaconess Medical Center Boston, Massachusetts.
• J Emerg Med. 2023 Sep 1; 65 (3): e250e255e250-e255.

BackgroundError in emergency medicine remains common and difficult to identify.ObjectiveTo evaluate if questioning emergency physician reviewers as to whether or not they would have done something differently (Would you have done something differently? [WYHDSD]) can be a useful marker to identify error.MethodsProspective data were collected on all patients presenting to an academic emergency department (ED) between 2017 and 2021. All cases who met the following criteria were identified: 1) returned to ED within 72 h and admitted; 2) transferred to intensive care unit from floor within 24 h of admission; 3) expired within 24 h of arrival; or 4) patient or provider complaint. Cases were randomly assigned to emergency physicians and reviewed using an electronic tool to assess for error and adverse events. Reviewers were then mandated to answer WYHDSD in the management of the case.ResultsDuring the study period, 6672 cases were reviewed. Of the 5857 cases where reviewers would not have done something differently, 5847 cases were found to have no error. The question WYHDSD had a sensitivity of 97.4% in predicting error and a negative predictive value of 99.8%.ConclusionThere was a significantly higher rate of near misses, adverse events, and errors attributable to an adverse event in cases where the reviewer would have done something differently (WHDSD) compared with cases where they would not. Therefore, asking reviewers if they WHDSD could potentially be used as a marker to identify error and improve patient care in the ED.Copyright © 2023 Elsevier Inc. All rights reserved.

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