Billing diagnoses do not accurately identify out-of-hospital cardiac arrest patients: An analysis of a regional healthcare system

摘要: Abstract Background International Classification of Diseases 9th Edition's Clinical Modification (ICD-9CM) codes are frequently used in health services research. We tested the operating characteristics ICD-9CM for identifying out-of-hospital cardiac arrest (OHCA) subjects. Methods to generate an "administrative cohort" subjects treated after possible OHCA at one six emergency departments (EDs) between January 2010 and April 2014. performed a structured chart review determine proportion this administrative cohort with actual (true positive rate ICD-9CM-based search method). The largest study site maintains prospective registry consecutive subjects, which we construct "registry cohort". calculate sensitivity strategy site, compared in-hospital mortality discharge dispositions two cohorts using Chi-square tests. Results identified 2461 that comprised cohort. Of these, true on was 40%. ICD9-CM code 100% coded as dead arrival 19% surviving ED disposition. There were 609 268 who presented site. Only 26 appeared both cohorts. In-hospital significantly higher than (91% vs. 61%, p Conclusion Compared registry, insensitive method identify Moreover, biased sample population mortality.