title: [Changes in immunological status among newly-diagnosed HIV-infected in Denmark 1995-2005].
abstract: BACKGROUND
  The incidence of new HIV diagnoses in Denmark has remained stable since 1991, but it has increased among the subgroup of homosexual men in recent years. This may reflect an actual increase in newly infected, e.g. as a result of increased risk behaviour, or it may reflect increased HIV testing. To clarify the causes of this increase we describe and analyse the development of HIV infection in Denmark in the period 1995-2005 with special emphasis on the route of transmission, immunological status at the time of diagnosis and the prevalence of patients at risk of transmitting HIV.
  
  
  METHODS
  Observational study based on the Danish HIV Cohort Study, which includes all adults seen at Danish HIV clinics since 1995.
  
  
  RESULTS
  From 2000 to 2004 the number of newly-infected homosexual men increased (from 69 to 123), particularly in persons under 30 years (from 5 to 42). The median CD4 cell count at the time of diagnosis increased in this group (median 19.1 cells/microL per year [95% CI: 3.7-11.3]), while it remained stable among heterosexually infected. The number of newly-diagnosed homosexually infected under 30 years with a CD4 cell count over 400 cells/microL increased from 0 in 2000 to 23 in 2004. The prevalence of patients with high viral load (and thus potentially at risk of transmitting HIV) decreased in all risk groups.
  
  
  CONCLUSIONS
  Newly-diagnosed homosexual men present at an earlier stage of disease progression and with a better preserved immune system today than 5-10 years ago, presumably due to a combination of frequent HIV testing and increased risk behaviour among young homosexuals in particular. Increased preventive measures targeting known risk groups are necessary to prevent further spread.
authors.affiliation: Odense Universitetshospital, Medicinsk Afdeling C. sfh@dadlnet.dk
authors.forename: Simon
authors.initials: S
authors.lastname: Høegh
authors.forename: Nicolai
authors.initials: N
authors.lastname: Lohse
authors.forename: Ann-Brit Eg
authors.initials: AB
authors.lastname: Hansen
authors.forename: Jan
authors.initials: J
authors.lastname: Gerstoft
authors.forename: Gitte
authors.initials: G
authors.lastname: Kronborg
authors.forename: Carsten S
authors.initials: CS
authors.lastname: Larsen
authors.forename: Court
authors.initials: C
authors.lastname: Pedersen
authors.forename: Gitte
authors.initials: G
authors.lastname: Pedersen
authors.forename: Alex L
authors.initials: AL
authors.lastname: Laursen
authors.forename: Birgit
authors.initials: B
authors.lastname: Kvinesdal
authors.forename: Axel
authors.initials: A
authors.lastname: Møller
authors.forename: Niels
authors.initials: N
authors.lastname: Obel
mesh_terms: D000328:Adult; D018791:CD4 Lymphocyte Count; D015331:Cohort Studies; D003718:Denmark / Q000453:epidemiology; D015658:HIV Infections / Q000453:epidemiology / Q000276:immunology* / Q000517:prevention & control / Q000635:transmission; D018451:Homosexuality, Male; D006801:Humans; D015994:Incidence; D008297:Male; D015995:Prevalence; D047568:Unsafe Sex; D019562:Viral Load