title: [Integrated detection and analysis on the clusters of schistosomiasis based on geographic information system].
abstract: OBJECTIVE
  To detect and analyze the clusters of schistosomiasis on marshland and lake areas based on geographic information system (GIS) in 2008 and to provide suggestions for the development of integrated methodology on the detection of clusters on related diseases.
  
  
  METHODS
  Moran's I of global spatial autocorrelation, Getis-Ord Gi of local spatial autocorrelation and SaTScan were used to detect the schistosomiasis clusters based on GIS and comparison of the results for different methods were performed.
  
  
  RESULTS
  Results from the global Moran's I tests for all the marshland and lake areas related to the schistosomiasis were statistically significant (P < 0.05) and indicated spatial heterogeneity;the z-score outcomes as calculated by Getis-Ord Gi indicated high cluster that 50 clusters were categorized at the 0.05 significance level and the z-score of these 45 clusters were more than 0. Results of SaTScan statistics appeared the same as local spatial autocorrelation and almost showing the existence of 5 cluster areas.
  
  
  CONCLUSIONS
  The geographical distribution of clusters where schistosomiasis was prevalent showed that it was closely corresponded to the middle and lower Yangtse river and in particular, many clusters were located near the boundary of Hubei and Hunan province.
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Key Laboratory on Public Health Safety, Ministry of Education, Shanghai 200032, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Zhao
authors.forename: Rong
authors.initials: R
authors.lastname: Zhu
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Zhang
authors.forename: Zhi-Jie
authors.initials: ZJ
authors.lastname: Zhang
authors.forename: Yuan-Pei
authors.initials: YP
authors.lastname: Li
authors.forename: Ming-Zhen
authors.initials: MZ
authors.lastname: He
authors.forename: Yi-Biao
authors.initials: YB
authors.lastname: Zhou
authors.forename: Jia-Gang
authors.initials: JG
authors.lastname: Guo
authors.forename: Gen-Ming
authors.initials: GM
authors.lastname: Zhao
authors.forename: Qing-Wu
authors.initials: QW
authors.lastname: Jiang
mesh_terms: D016000:Cluster Analysis; D040362:Geographic Information Systems; D006801:Humans; D060106:Lakes; D045483:Rivers; D012552:Schistosomiasis; D062206:Spatial Analysis