Journal
VACCINE
Volume 27, Issue 14, Pages 2077-2083Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.vaccine.2009.01.105
Keywords
Natural language processing; Vaccine adverse events; Electronic medical records
Categories
Funding
- Centers for Disease Control and Prevention (CDC) through America's Health Insurance Plans (AHIP) [200-2002-00732]
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The Vaccine Safety Datalink (VSD) is a collaboration between the CDC and eight large HMOs to investigate adverse events following immunization through analyses of clinical data. We modified an existing system, called MediClass, that uses natural language processing to identify clinical events recorded in electronic medical records (EMRs). We Customized MediClass so it could detect possible vaccine adverse events (VAEs) generally, and gastrointestinal-related VAEs in particular, in the text clinical notes of encounters recorded in the EMR of a large HMO. Compared to methods that use diagnosis and utilization codes assigned to encounters by clinicians and administrators, the MediClass system can both find more adverse events and improve the positive predictive value for detecting possible VAEs. (C) 2009 Elsevier Ltd. All rights reserved.
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