title: [Study on early warning method for influenza epidemic in Gansu province].
abstract: OBJECTIVE
  To explore the appropriate early warning method for influenza epidemic in Gansu province.
  
  
  METHODS
  By using simple control chart, moving percentile method, exponential smoothing method and cumulative sum control chart method, the annual incidence data of influenza-like illness in Gansu province during 2014-2015 were analyzed, and the sensitivities, specificities, positive predictive values, Jorden indexes and Kappa values of the 4 methods were evaluated and compared.
  
  
  RESULTS
  The 2014-2015 seasonal influenza epidemic occurred in the fiftieth week of 2014 in Gansu, and the epidemic peak lasted for 6 weeks. Cumulative sum control chart method had the best early warning effect with the sensitivity of 66.67% and specificity of 93.48%.
  
  
  CONCLUSIONS
  It is feasible to use cumulative sum control chart method to give early warning of influenza epidemic in Gansu.
authors.affiliation: Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China.
authors.forename: Xiaoting
authors.initials: X
authors.lastname: Yang
authors.forename: Xinfeng
authors.initials: X
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Meng
authors.forename: Dongpeng
authors.initials: D
authors.lastname: Liu
authors.forename: Deshan
authors.initials: D
authors.lastname: Yu
authors.forename: Hongyu
authors.initials: H
authors.lastname: Li
authors.forename: Zhongyi
authors.initials: Z
authors.lastname: Jiang
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
mesh_terms: D002681:China / Q000453:epidemiology; D018563:Disease Notification / Q000379:methods*; D058872:Epidemics; D005240:Feasibility Studies; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D012621:Seasons