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A simulation study comparing aberration detection algorithms for syndromic surveillance.

Abstract：

BACKGROUND:The usefulness of syndromic surveillance for early outbreak detection depends in part on effective statistical aberration detection. However, few published studies have compared different detection algorithms on identical data. In the largest simulation study conducted to date, we compared the performance of six aberration detection algorithms on simulated outbreaks superimposed on authentic syndromic surveillance data. METHODS:We compared three control-chart-based statistics, two exponential weighted moving averages, and a generalized linear model. We simulated 310 unique outbreak signals, and added these to actual daily counts of four syndromes monitored by Public Health--Seattle and King County's syndromic surveillance system. We compared the sensitivity of the six algorithms at detecting these simulated outbreaks at a fixed alert rate of 0.01. RESULTS:Stratified by baseline or by outbreak distribution, duration, or size, the generalized linear model was more sensitive than the other algorithms and detected 54% (95% CI = 52%-56%) of the simulated epidemics when run at an alert rate of 0.01. However, all of the algorithms had poor sensitivity, particularly for outbreaks that did not begin with a surge of cases. CONCLUSION:When tested on county-level data aggregated across age groups, these algorithms often did not perform well in detecting signals other than large, rapid increases in case counts relative to baseline levels.

journal_name

BMC Med Inform Decis Mak

journal_title

BMC medical informatics and decision making

authors

Jackson ML,Baer A,Painter I,Duchin J

doi

10.1186/1472-6947-7-6

subject

Has Abstract

pub_date

2007-03-01 00:00:00

pages

6

issn

1472-6947

pii

1472-6947-7-6

journal_volume

7

pub_type

杂志文章

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