title: The effect of antiretroviral treatment of different durations in primary HIV infection.
abstract: OBJECTIVE
  To compare immunological, virological and clinical outcomes in persons initiating combination antiretroviral therapy (cART of different durations within 6 months of seroconversion (early treated) with those who deferred therapy (deferred group).
  
  
  METHODS
  CD4 cell and HIV-RNA measurements for 'early treated' individuals following treatment cessation were compared with the corresponding ART-free period for the 'deferred' group using piecewise linear mixed models. Individuals identified during primary HIV infection were included if they seroconverted from 1st January 1996 and were at least 15 years of age at seroconversion. Those with at least 2 CD4 less than 350 cells/microl or AIDS within the first 6 months following seroconversion were excluded.
  
  
  RESULTS
  Of 348 'early treated' patients, 147 stopped cART following treatment for at least 6 (n = 38), more than 6-12 (n = 40) or more than 12 months (n = 69). CD4 cell loss was steeper for the first 6 months following cART cessation, but subsequent loss rate was similar to the 'deferred' group (n = 675, P = 0.26). Although those treated for more than 12 months appeared to maintain higher CD4 cell counts following cART cessation, those treated for 12 months or less had CD4 cell counts 6 months after cessation comparable to those in the 'deferred' group. There was no difference in HIV-RNA set points between the 'early' and 'deferred' groups (P = 0.57). AIDS rates were similar but death rates, mainly due to non-AIDS causes, were higher in the 'deferred' group (P = 0.05).
  
  
  CONCLUSIONS
  Transient cART, initiated within 6 months of seroconversion, seems to have no effect on viral load set point and limited beneficial effect on CD4 cell levels in individuals treated for more than 12 months. Its long-term effects remain inconclusive and need further investigation.
authors.affiliation: Department of Hygiene, Epidemiology and Medical Statistics, Athens University Medical School, Athens, Greece. npantaz@med.uoa.gr
authors.forename: Nikos
authors.initials: N
authors.lastname: Pantazis
authors.forename: Giota
authors.initials: G
authors.lastname: Touloumi
authors.forename: Philippe
authors.initials: P
authors.lastname: Vanhems
authors.forename: John
authors.initials: J
authors.lastname: Gill
authors.forename: Heiner C
authors.initials: HC
authors.lastname: Bucher
authors.forename: Kholoud
authors.initials: K
authors.lastname: Porter
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D044966:Anti-Retroviral Agents / Q000627:therapeutic use*; D018791:CD4 Lymphocyte Count / Q000379:methods; D018450:Disease Progression; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D005260:Female; D015658:HIV Infections / Q000188:drug therapy* / Q000276:immunology / Q000821:virology; D015497:HIV-1 / Q000276:immunology*; D006801:Humans; D008297:Male; D012367:RNA, Viral / Q000378:metabolism*; D016896:Treatment Outcome; D019562:Viral Load; D055815:Young Adult
chemical_list: D044966:Anti-Retroviral Agents; D012367:RNA, Viral