title: [Establishment of early warning control charts based on the syndromic surveillance data of outpatient diarrhea in Beijing].
abstract: OBJECTIVE
  To establish the control charts for early warning of diarrhea based on the syndromic surveillance data from enteric clinic in Beijing.
  
  
  METHODS
  The outpatient data from enteric clinic of a Grade Three General hospital in Haidian district, Beijing from April 1 to Oct. 31, 2009 and from May 1 to Nov.10, 2010 were collected, according to the moving average method, the baseline calculated, the value of probability α and μα, the early warning value based on the formula "w=Xj+μαSj" calculated and the early warning control charts drew at last.
  
  
  RESULTS
  According to the harmfulness, the severity and controllability of diarrheal diseases, the value of probability α was determined as 0.01, then μα (unilateral) as 2, based on the early warning value, the control charts of diarrheal diseases, bacillary dysentery and other infectious diarrhea were established.
  
  
  CONCLUSIONS
  The enteric clinic requires to further collect baseline data to evaluate and continuously adjust the established control charts for the best early warning model in accordance with the enteric clinic.
authors.affiliation: Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China.
authors.forename: Pin-ze
authors.initials: PZ
authors.lastname: Wang
authors.affiliation: Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China.
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.affiliation: Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China.
authors.forename: Xiao-qiu
authors.initials: XQ
authors.lastname: Dai
authors.affiliation: Peking University Third Hospital, Beijing 100191, China.
authors.forename: Xue-song
authors.initials: XS
authors.lastname: Yang
authors.affiliation: Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China.
authors.forename: Hai-shan
authors.initials: HS
authors.lastname: Kadeerbai
authors.affiliation: Peking University Third Hospital, Beijing 100191, China.
authors.forename: Xiao-guang
authors.initials: XG
authors.lastname: Li
authors.affiliation: Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China.
authors.forename: Li
authors.initials: L
authors.lastname: Shen
authors.affiliation: Peking University Third Hospital, Beijing 100191, China.
authors.forename: Zheng-hui
authors.initials: ZH
authors.lastname: Wang
authors.affiliation: Peking University Third Hospital, Beijing 100191, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Wu
authors.affiliation: Peking University Third Hospital, Beijing 100191, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Xu
authors.affiliation: Peking University Third Hospital, Beijing 100191, China.
authors.forename: Yong-zhong
authors.initials: YZ
authors.lastname: Ning
mesh_terms: D003627:Data Interpretation, Statistical; D003967:Diarrhea; D018563:Disease Notification; D004405:Dysentery, Bacillary; D006801:Humans; D010045:Outpatients; D011159:Population Surveillance / Q000379:methods*