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Displaying results 1 - 8 of 17
  • Sensitivity and Specificity of an Ngram Method for Classifying Emergency Department Visits into the Respiratory Syndrome in the Turkish Language

    Content Type: Abstract

    Previously we developed an “Ngram” classifier for syndromic surveillance of emergency department (ED) chief complaints (CC) in Turkish for bioterrorism. The classifier is developed from a set of ED visits for which both the ICD… read more
    … The classifier is developed from a set of ED visits for which both the ICD diagnosis code and CC are … or “out” of the syndrome. It is possible to dichotomize visits “in” or “out” using N-grams by choosing a cut-off …
  • Variation in Visits Classified by GI ICD9 Biosurveillance Sub-Filters as a Function of Age

    Content Type: Abstract

    The CDC recently developed sub-syndromes for classifying disease to enhance syndromic surveillance of natural outbreaks and bioterrorism. They have developed ICD9 classifiers for six GI Illness subsyndromes: Abdominal Pain,… read more
    … infections, and Food poisoning. If the number of visits for sub-syndromes varies significantly by age it may impact the design of outbreak detection methods.   …
  • Optimizing Performance of an Ngram Method for Classifying Emergency Department Visits into the Respiratory Syndrome

    Content Type: Abstract

    A number of different methods are currently used to classify patients into syndromic groups based on the patient’s chief complaint (CC). We previously reported results using an “Ngram” text processing program for building classifiers… read more
    … applies the ICD9 classifier to a training set of ED visits for which both the CC and ICD9 code are known. A … Specificity “HEST” (.84) “COUG” (.93) “FEVE” (.47) y Advances in Disease Surveillance 2007;2:1 … A number of …
  • The NGram CC Classifier: A Novel Method of Automatically Creating CC Classifiers Based on ICD9 Groupings

    Content Type: Abstract

    Syndromic surveillance of emergency department (ED) visit data is often based on computer algorithms which assign patient chief complaints (CC) to syndromes. ICD9 code data may also be used to develop visit classifiers for syndromic surveillance but… read more
    … Syndromic surveillance of emergency department (ED) visit data is often based on computer algorithms which … applies the ICD9 classifier to a training set of ED visits for which both the CC and ICD9 code are known. A … ly C ou nt s ICD ngram Fig. 2 Daily Counts N gram vs ICD y = 0.56x + 23.68 R = 0.9 0.0 20.0 40.0 60.0 80.0 100.0 …
  • Improvement in Performance of Ngram Classifiers with Frequent Updates

    Content Type: Abstract

      Syndromic surveillance of emergency department(ED) visit data is often based on computerized classifiers which assign patient chief complaints (CC) tosyndromes. These classifiers may need to be updatedperiodically to account for changes… read more
    …   Syndromic surveillance of emergency department(ED) visit data is often based on computerized classifiers which … chief complaints (CC) tosyndromes. These classifiers may need to be updatedperiodically to account for changes … automatically based on a training set of patient visits for which both the CC and ICD9 are available. This …
  • Investigating Syndromic Peaks Using Remotely Available Electronic Medical Records

    Content Type: Abstract

    One limitation of syndromic surveillance systems based on emergency department (ED) data is the time and expense to investigate peak signals, especially when that involves phone calls or visits to the hospital. Many EDs use electronic medical… read more
    … signals, especially when that involves phone calls or visits to the hospital. Many EDs use electronic medical … (EMRs) which are available remotely in real time. This may facilitate the investigation of peak signals. Document … or absence of selected pertinent data elements for each visit, and also to assign each visit to one or more defined …
  • The Utility of Patient Chief Complaint and ICD 9 Classifiers for the Influenza Sub-Syndrome

    Content Type: Abstract

    In order to detect influenza outbreaks, the New York State Department of Health emergency department (ED) syndromic surveillance system uses patients’ chief complaint (CC) to assign visits to respiratory and fever syndromes… read more
    … system uses patients’ chief complaint (CC) to assign visits to respiratory and fever syndromes. Recently, the … of flu. Our own experience was that although flu may be a com- mon presentation in the ED during the flu season, it is … 23% (18%-28%) 60% (51%-69%) PPV CORRECTED (95% CIS) 31% (26%-36%) 79% (72%-86%) False positive CC were usually due to …
  • The Performance of a NGram Classifier for Patients' Chief Complaint Based on a Computerized Pick List Entry and Free Text in an Italian Emergency Department

    Content Type: Abstract

    Syndromic surveillance of emergency department (ED) visit data is often based on computer algorithms which assign patient chief complaints (CC) and ICD code data to syndromes. The triage nurse note (NN) has also been used for… read more
    … Syndromic surveillance of emergency department (ED) visit data is often based on computer algorithms which … The classifier is developed from a set of ED visits for which both the ICD diagnosis code and CC are … The classifier is developed from a set of ED visits for which both the ICD diagnosis code and CC are …