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Displaying results 9 - 16 of 41
  • An Exploration of New Uses of Traditional Data within an Ecological Study: Air Quality Effects on Pediatric Asthma Exacerbation Analysis

    Content Type: Abstract

    Under a grant from the Centers for Disease Control and Prevention (CDC), the DC DOH established the Environmental Public Health Tracking Program (EPHTP) to monitor specific environmental and public health indicators and to investigate any… read more
    … 2004 and DC hospital pediatric emergency department (ED) visits for asthma exacerbations.    Objective The study … the relationship between air quality and pediatric ED visits for asthma among DC residents over a 3 year period. … air quality and pediatric emergency department (ED) visits for asthma among DC residents over a 3 year period. …
  • Performance Characteristics of Control Chart Detection Methods

    Content Type: Abstract

    To recognize outbreaks so that early interventions can be applied, BioSense uses a modification of the EARS C2 method, stratifying days used to calculate the expected value by weekend vs weekday, and including a rate-based method… read more
    … and including a rate-based method that accounts for total visits. These modifications produce lower residuals … and including a rate-based method that accounts for total visits (2). These modifications produce lower residuals … count vs rate methods, the latter accounting for total visits (i.e., both visits assigned and not assigned to a …
  • The Development of Virtual Data for Syndromic Surveillance Exercises

    Content Type: Abstract

    On 27 April 2005, a simulated bioterrorist event—the aerosolized release of Francisella tularensis in the men’s room of luxury box seats at a sports stadium—was used to exercise the disease surveillance capability of the National Capital Region (NCR… read more
    … requirements and represented both ‘normal’ endemic visits (the background) as well as outbreak-specific records … requirements and represented both ‘normal’ endemic visits (the background) as well as outbreak-specific records … create the background data, emergency depart- ment (ED) visits were generated for each political unit in the NCR. ED …
  • Analytic Fusion of ESSENCE Clinical Evidence Sources for Routine Decision Support

    Content Type: Abstract

    Block 3 of the US Military Electronic Surveillance System for Early Notification of Community-Based Epidemics (ESSENCE) system affords routine access to multiple sources of data. These include administrative clinical encounter records in the… read more
    … and others. CAPER records include a free-text Reason for Visit field, analogous to chief complaint text in civilian … and others. CAPER records include a free-text Reason for Visit field, analogous to chief complaint text in civilian … ehtj11115 ehtj11120 ehtj11024 ehtj11060 ehtj11110 26-50 ehtj11034 ehtj11198 ehtj11174 ehtj11048 ehtj11154 …
  • Analytic disease surveillance methodology based on emulation of experienced human monitors

    Content Type: Abstract

    Recently published studies evaluate statistical alerting methods for disease surveillance based on detection of modeled signals in a data background of either authentic historical data or randomized samples. Differences in regional… read more
    … based on standard data distributions or stylized signals may not alert as desired. Practical algorithm evaluation and adjustment may be possible by judging algorithmperformance according to … based on standard data distributions or stylized signals may not alert as desired. Practical algorithm evaluation and …
  • A Term-based Approach to Asyndromic Determination of Significant Case Clusters

    Content Type: Abstract

    Biosurveillance systems commonly depend on free-text chief complaints (CC)s for timely situational awareness. However, diagnosis codes may not be available soon enough and may have uncertain value because they are assigned for billing purposes… read more
    … timely situational awareness. However, diagnosis codes may not be available soon enough and may have uncertain value because they are assigned for … timely situational awareness. However, diagnosis codes may not be available soon enough and may have uncertain …
  • Tuning a Chief Complaint Text Parser for Use in DoD ESSENCE

    Content Type: Abstract

    An expanded ambulatory health record, the Comprehensive Ambulatory Patient Encounter Record (CAPER) will provide multiple types of data for use in DoD ESSENCE. A new type of data not previously available is the Reason for Visit (ROV), a free-text… read more
    … type of data not previously available is the Reason for Visit (ROV), a free-text field analogous to the Chief … CC Yes CC No Ratio CC only to ICD only ILI before ICD Y 194,957 1,382,852 0.6 ICD N 762,842 38,904,014 ILI after … ehtj11115 ehtj11120 ehtj11024 ehtj11060 ehtj11110 26-50 ehtj11034 ehtj11198 ehtj11174 ehtj11048 ehtj11154 …
  • Another Type of Cluster Monitoring: Detection of Groups of Anomalous Patient Residence Locations

    Content Type: Abstract

    The Veterans Health Administration (VHA) uses the Electronic Surveillance System for the Early Notification of Community-based Epidemics to detect disease outbreaks and other health-related events earlier than other forms of surveillance. Although… read more
    … than other forms of surveillance. Although Veterans may use any VHA facility in the world, the strongest … by ICD-9 code and chart review), date and location of visit and patients’ zip code of residence. We also accessed … were evaluated for flu symptoms. (The alert on July 26, 2009, was a part of this same outbreak.) Using this …