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What is the Value of a Positive Syndromic Surveillance Signal?
Content Type: Abstract
One criterion for evaluating the effectiveness of a surveillance system is the system’s positive predictive value. To our knowledge few studies have described the positive predictive value of syndromic surveillance signals… read more… departments (EDs) in King County. EDs send data on all visits that occurred the previous day. Aberrations in the … communicable disease reporting mechanisms (e.g., via phone or fax). A signal was classified as a true positive if … -
Systematic Comparison of Algorithms Used in Syndromic Surveillance
Content Type: Abstract
Varied approaches have been used by syndromic surveillance systems for aberration detection. However, the performance of these methods has been evaluated only across a small range of epidemic characteristics. Objective… read more… syndromes having average daily counts of 2, 10, 35 and 50 visits per day. We then simulated epidemics by creating all …