title: [Exploration on statistical method for calculating intensity of the infection in residents in nationwide sampling survey of schistosomiasis].
abstract: OBJECTIVE
  To set up statistical methods for calculation of intensity of schistosome infection in residents in nationwide sampling survey of schistosomiasis.
  
  
  METHODS
  Based on the epidemiological survey of schistosomiasis and according to the medical statistics for multiple stratifying and clustering random sampling, the calculation method on intensity of schistosome infection was inferred.
  
  
  CONCLUSIONS
  Nine formulas were worked out for the calculation of the intensity of schistosome infection in different endemic provinces with different ecotypes. These formulas are of practical value.
authors.affiliation: Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai 200025.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: Z
authors.initials: Z
authors.lastname: Hua
authors.forename: W
authors.initials: W
authors.lastname: Wu
authors.forename: J
authors.initials: J
authors.lastname: Guo
authors.forename: X
authors.initials: X
authors.lastname: Wu
authors.forename: J
authors.initials: J
authors.lastname: Zheng
mesh_terms: D002681:China / Q000453:epidemiology; D016000:Cluster Analysis; D006801:Humans; D015995:Prevalence; D012494:Sampling Studies; D012554:Schistosomiasis japonica / Q000453:epidemiology*