BackgroundDiagnostic error is commonly defined as a missed, delayed or wrong diagnosis and has been described as among the most important patient safety hazards. Diagnostic errors also account for the largest category of medical malpractice high severity claims and total payouts. Despite a large literature on the incidence of inpatient adverse events, no systematic review has attempted to estimate the prevalence and nature of harmful diagnostic errors in hospitalised patients.MethodsA systematic literature search was conducted using Medline, Embase, Web of Science and the Cochrane library from database inception through 9 July 2019. We included all studies of hospitalised adult patients that used physician review of case series of admissions and reported the frequency of diagnostic adverse events. Two reviewers independently screened studies for inclusion, extracted study characteristics and assessed risk of bias. Harmful diagnostic error rates were pooled using random-effects meta-analysis.ResultsTwenty-two studies including 80 026 patients and 760 harmful diagnostic errors from consecutive or randomly selected cohorts were pooled. The pooled rate was 0.7% (95% CI 0.5% to 1.1%). Of the 136 diagnostic errors that were described in detail, a wide range of diseases were missed, the most common being malignancy (n=15, 11%) and pulmonary embolism (n=13, 9.6%). In the USA, these estimates correspond to approximately 249 900 harmful diagnostic errors yearly.ConclusionBased on physician review, at least 0.7% of adult admissions involve a harmful diagnostic error. A wide range of diseases are missed, including many common diseases. Fourteen diagnoses account for more than half of all diagnostic errors. The finding that a wide range of common diagnoses are missed implies that efforts to improve diagnosis must target the basic processes of diagnosis, including both cognitive and system-related factors.PROSPERO registration numberCRD42018115186.

Background and Purpose— In older populations, transient ischemic attack (TIA) and ischemic stroke have been linked to psychological factors, including posttraumatic stress disorder (PTSD). Whether PTSD also increases risk for early incident stroke in young adults is unknown. Methods— We prospectively assessed the incidence of TIA and ischemic stroke in a cohort of 987 855 young and middle-aged Veterans (mean age of 30.29±9.19 years; 87.8% men, 64.4% white) who first accessed care through the Veterans Health Administration from October 2001 to November 2014 and were free of TIA and ischemic stroke at baseline. For each outcome, time-varying multivariate Cox models were constructed to examine the effect of PTSD on incident stroke. We also assessed for effect modification by sex. Additional sensitivity analyses controlled for healthcare utilization. Results— Over a 13-year period, TIA and ischemic stroke were diagnosed in 766 and 1877 patients, respectively. PTSD was diagnosed in 28.6% of the sample during follow-up. In unadjusted analyses, PTSD was significantly associated with new-onset TIA (hazard ratio [HR], 2.02; 95% CI, 1.62–2.52) and ischemic stroke (HR, 1.62; 95% CI, 1.47–1.79). In fully adjusted models, the association between PTSD and incident TIA (HR, 1.61; 95% CI, 1.27–2.04) and ischemic stroke (HR, 1.36; 95% CI, 1.22–1.52) remained significant. The effect of PTSD on ischemic stroke risk was stronger in men than in women (HR, 0.63; 95% CI, 0.47–0.86; P =0.003), but no effect of sex was found for TIA. Conclusions— PTSD is associated with a significant increase in risk of early incident TIA and ischemic stroke independent of established stroke risk factors, coexisting psychiatric disorders, and healthcare utilization. Sex moderated the relationship for adults with ischemic stroke but not TIA. These findings suggest that psychological factors, including PTSD, may be important targets for future age-specific prevention strategies for young adults.

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