Use of multiple imputation to assess infection rate of schistosomisasis japonicum

  Objective   To assess the schistosomiasis infection rate of the surveillance spots.

  Methods   One surveillance spot was sampled at random from the twelve national surveillance spots, in which resident were screened by blood detection first and then were diagnosed by stool examination.The factors related with schistosomiasis infection were survey be questionnaire, and the infection rate of schistosomiasis was assessed by multiple imputation.

  Results   In Quanxing village, the proportion of stool-positive resident assessed by the multiple imputation was about 20% and the proportion of resident who would show positive in the underwent stool examination was 8 percent among the 415 resident who were negative by IHA detection.

  Conclusion   The proportion of stool-positive resident was underestimated in Quanxing village, and the underestimated proportion was about 5 percent.