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  • Content Type: Abstract

    The Electronic Surveillance System for the Early Notification of Community-based Epidemics (ESSENCE) obtains electronic data from 153 Veterans Affairs (VA) Medical Centers plus outpatient clinics in all 50 states, American Samoa, Guam,… read more
    … for the Early Notification of Community-based Epidemics (ESSENCE) obtains electronic data from 153 Veterans Affairs … predictive value of ICD-9-CM diagnosis codes in VA ESSENCE to determine the utility of this system … the utility of ICD-9-CM diagnosis codes in the VA ESSENCE for detection and public health surveillance of …