title: [Burden of disease in schistosomiasis japonica. I. Calculation and evaluation of years lived with disability of chronic schistosomiasis].
abstract: OBJECTIVE
  To discuss the evaluation index of the disease burden of chronic schistosomiasis and its calculation methods.
  
  
  METHODS
  The epidemiological data came from the thematic research carried out in two schistosome-endemic counties in lake areas between 2004 and 2005. The specific prevalence rates by age group, gender and endemic type were calculated. According to the age-specific disability weight obtained in the thematic research, the years lived with disability (YLDs) and the rates of YLD of stratified samples by age and gender, and the total YLDs of the two counties were calculated.
  
  
  RESULTS
  The total YLDs were 1 056.26 and 3 967.43 person-years in Dangtu and Hanshou counties, respectively. The contributing rate of Grade I type village to the total YLDs of two counties was 37.95% (40.08% in Dangtu and 37.39% in Hanshou). For different stratums by age and gender, the older ones and male tended to have larger YLDs. Compared to the non-endemic areas, chronic schistosomiasis brought an average extra of 4.398 and 1.505 years per 1 000 person to population in Dangtu and Hanshou counties, respectively.
  
  
  CONCLUSIONS
  The evaluation to YLDs of chronic schistosomiasis is helpful for prioritizing intervention areas and population, as well as providing a new index for the evaluation of effectiveness of control measures.
authors.affiliation: National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China.
authors.forename: Tie-Wu
authors.initials: TW
authors.lastname: Jia
authors.forename: Le-Ping
authors.initials: LP
authors.lastname: Sun
authors.forename: Qing-Biao
authors.initials: QB
authors.lastname: Hong
authors.forename: Yao
authors.initials: Y
authors.lastname: Deng
authors.forename: Gong-Hua
authors.initials: GH
authors.lastname: Zhang
authors.forename: Hao
authors.initials: H
authors.lastname: Wang
authors.forename: Ping
authors.initials: P
authors.lastname: Yi
authors.forename: Jia-Gang
authors.initials: JG
authors.lastname: Guo
authors.forename: Xiao-Nong
authors.initials: XN
authors.lastname: Zhou
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D002681:China; D002908:Chronic Disease / Q000191:economics*; D017281:Cost of Illness; D006233:Persons with Disabilities; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019057:Quality-Adjusted Life Years; D012554:Schistosomiasis japonica / Q000191:economics* / Q000453:epidemiology; D055815:Young Adult