title: Longitudinal assessment (1995-2003) of hospitalizations of HIV-infected patients within a geographical population in Canada.
abstract: OBJECTIVE
  To determine the frequency of and reasons for hospitalization of adult HIV-infected patients compared with the general population.
  
  
  METHODS
  Length of stay, primary/secondary diagnoses and discharge status were reviewed for all HIV-infected patients admitted to Calgary-area hospitals between 1995 and 2003. Admissions were classified as HIV- or non-HIV-related using International Classification of Diseases, 9th and 10th revisions (ICD-9/10) codes and confirmed by chart review. Summary comparative data on admissions for the general population were obtained from the regional administrative database.
  
  
  RESULTS
  HIV-infected adults were hospitalized more than twice as frequently, experienced longer stays (median length 5 vs 3 days, respectively) and had higher in-hospital mortality rates (9.1 vs 1.3 per 100 admissions, respectively) than the general population (P < 0.01). Hospitalizations of HIV-infected patients declined by 58% from 1995 to 2003. Patients newly diagnosed with HIV infection accounted for 15% of all HIV-related hospitalizations. HIV-related admissions for known HIV-infected patients decreased from 12 per 100 patient-years-followed in 1995 to 3 per 100 patient-years-followed in 2003. Low CD4 counts, AIDS, and no current use of highly active antiretroviral therapy (HAART) were strongly correlated with hospitalizations (P < 0.01). Non-HIV-related hospitalizations for HIV-infected patients increased by 42% and were associated with comorbidities (e.g. substance use and psychological disorders).
  
  
  CONCLUSIONS
  Despite the reduction in HIV-related hospitalizations following the introduction of HAART, all-cause hospitalization rates have increased and have started to erode this benefit.
authors.affiliation: Faculty of Medicine, Department of Medicine, University of Calgary, Calgary, Alberta, Canada. hartmut.krentz@calgaryhealthregion.ca
authors.forename: H B
authors.initials: HB
authors.lastname: Krentz
authors.forename: S
authors.initials: S
authors.lastname: Dean
authors.forename: M J
authors.initials: MJ
authors.lastname: Gill
mesh_terms: D000328:Adult; D000416:Alberta; D018791:CD4 Lymphocyte Count; D005260:Female; D015658:HIV Infections / Q000628:therapy*; D017052:Hospital Mortality; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D007902:Length of Stay; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D012307:Risk Factors