title: [The natural history of HIV infection among IDUs in Ruili, Yunnan province, China].
abstract: OBJECTIVE
  To study the natural history of HIV infections among intravenous drug users.
  
  
  METHODS
  Six hundred and twenty five HIV infected people in Ruili, Yunnan province were observed. Retrospective data was analysed combined with a cross - sectional survey.
  
  
  RESULTS
  The number of death was 190 among 625 HIV - positive people. The cumulative death rate among HIV infected persons was 76.9 per 1,000 person - year, and the AIDS related death rate was 19.8 per 1,000 person - year. The median survival period of HIV infected persons was 9 years, and the median incubation period was about 8 years.
  
  
  CONCLUSIONS
  Of HIV infected people in Ruili, the median survival and incubation period were shorter compared with those in the United States and Western Europe.
authors.affiliation: National Center for AIDS Prevention and Control, Beijing 100050, China.
authors.forename: X
authors.initials: X
authors.lastname: Zheng
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Duan
authors.forename: S
authors.initials: S
authors.lastname: Qu
authors.forename: Y
authors.initials: Y
authors.lastname: Duan
authors.forename: G
authors.initials: G
authors.lastname: Zhang
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D018450:Disease Progression; D005260:Female; D015658:HIV Infections / Q000453:epidemiology* / Q000401:mortality; D006679:HIV Seropositivity / Q000453:epidemiology*; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D015819:Substance Abuse, Intravenous / Q000150:complications*; D015996:Survival Rate