BMJ Quality & Safety Online First, published on 7 August 2013 as 10.1136/bmjqs-2012-001615NARRATIVE REVIEW BMJ Qual Saf: first published as 10.1136/bmjqs-2012-001615 on 15 June 2013. Downloaded from The incidence of diagnostic error in medicine Mark L Graber ▸ Additional material is ABSTRACT wrong, missed, or egregiously delayed? published online only. To view A wide variety of research studies suggest that How often do diagnostic errors cause please visit the journal online (http://dx.doi.org/10.1136/bmjqs- breakdowns in the diagnostic process result in a harm? In this report, we briefly summar- 2012-001615). staggering toll of harm and patient deaths. ise the methods that have been used to These include autopsy studies, case reviews, estimate the rate of diagnostic error, Correspondence to Dr Mark L Graber, RTI surveys of patient and physicians, voluntary and comment on their relative merits and International, SUNY Stony Brook reporting systems, using standardised patients, limitations. A more comprehensive pres- School of Medicine, 1 Breezy second reviews, diagnostic testing audits and entation of studies using each of these Hollow, St James, NY 11780, closed claims reviews. Although these different methodologies has been presented USA;
[email protected] approaches provide important information and elsewhere.6 Received 5 November 2012 unique insights regarding diagnostic errors, each Revised 28 April 2013 has limitations and none is well suited to Accepted 30 April 2013 THE INCIDENCE OF DIAGNOSTIC establishing the incidence of diagnostic error in ERROR actual practice, or the aggregate rate of error Arthur Elstein, a cognitive psychologist and harm. We argue that being able to measure interested in ‘how doctors think’, studied the incidence of diagnostic error is essential to clinical decision making for his entire enable research studies on diagnostic error, and career and concluded the diagnosis is to initiate quality improvement projects aimed at wrong 10–15% of the time.7 A diverse reducing the risk of error and harm.