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Effect of magnitude and duration on the performance of Cumulative Sum
Author(s): 
Pages: 617-621
Year: Issue:  6
Journal: Chinese Journal of Epidemiology

Keyword:  Outbreak magnitudeOutbreak durationCumulative SumPerformance of alertSimulation method;
Abstract: 采用数据模拟方法,在一段服从Poisson分布的数据序列中插入11个不同暴发规模、不同持续时间的暴发事件,研究暴发规模和持续时间对CUSUM(Cumulative Sum)预警模型效能的影响.结果发现,在现有模拟条件下,灵敏度为9.1%~100.0%,特异度≥98.6%;灵敏度与暴发规模有明显的关系,暴发强度越大,灵敏度越高,而暴发持续时间并不影响灵敏度;灵敏度达到100.0%,暴发规模需≥2.6...
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