title: Life expectancy of patients with newly-diagnosed HIV infection in the era of highly active antiretroviral therapy.
abstract: BACKGROUND
  Limited data are available on the life expectancy of patients with newly-diagnosed HIV infection in the era of highly active antiretroviral therapy (HAART).
  
  
  OBJECTIVE
  To provide such an estimate using a semi-parametric projection.
  
  
  METHODS
  Statistical analysis.
  
  
  METHODS
  Follow-up data for patients newly diagnosed with HIV infection in Taiwan (HIV/AIDS Cohort) from 1 May 1997 to 30 April 2003 (n = 3351, only 1% are injecting drug users) were analysed using the Kaplan-Meier method. The survival function for an age- and gender-matched reference population was generated by the Monte Carlo method from the life-table of the general population. A constant excess hazard model was used to project long-term survival of HIV-infected patients, with linear extrapolation of a logit-transformed curve of survival ratio between HIV-infected patients and the reference population.
  
  
  RESULTS
  The 5-year survival rate was 58% in patients who had already developed AIDS at diagnosis (AIDS group), and 89% in those who had not (non-AIDS group). Extrapolation yielded an expected mean survival time of 10.6 years after diagnosis for the AIDS group, and 21.5 years after diagnosis for the non-AIDS group.
  
  
  CONCLUSIONS
  Our results support the expansion of HIV screening programs to minimize delay in diagnosis. With continuing advances in HAART, this estimate of survival in initially asymptomatic patients may be conservative. Their long life expectancy raises questions about what kind of preventive heath services should be offered. These should be addressed through further analysis of overall benefit and cost-effectiveness.
authors.affiliation: Department of Internal Medicine, National Taiwan University Hospital, No. 7 Chung San South Road, Taipei, Taiwan.
authors.forename: C T
authors.initials: CT
authors.lastname: Fang
authors.forename: Y Y
authors.initials: YY
authors.lastname: Chang
authors.forename: H M
authors.initials: HM
authors.lastname: Hsu
authors.forename: S J
authors.initials: SJ
authors.lastname: Twu
authors.forename: K T
authors.initials: KT
authors.lastname: Chen
authors.forename: C C
authors.initials: CC
authors.lastname: Lin
authors.forename: L Y L
authors.initials: LY
authors.lastname: Huang
authors.forename: M Y
authors.initials: MY
authors.lastname: Chen
authors.forename: J S
authors.initials: JS
authors.lastname: Hwang
authors.forename: J D
authors.initials: JD
authors.lastname: Wang
authors.forename: C Y
authors.initials: CY
authors.lastname: Chuang
mesh_terms: D000328:Adult; D017677:Age Distribution; D023241:Antiretroviral Therapy, Highly Active; D005260:Female; D015658:HIV Infections / Q000188:drug therapy* / Q000401:mortality; D006801:Humans; D008017:Life Expectancy / Q000639:trends; D008297:Male; D008875:Middle Aged; D009010:Monte Carlo Method; D017678:Sex Distribution; D015996:Survival Rate / Q000639:trends; D013624:Taiwan