title: Effect of age and HAART regimen on clinical response in an urban cohort of HIV-infected individuals.
abstract: OBJECTIVE
  The prevalence of HIV infection in older patients (> or =50 years) is increasing due to HAART, and new HIV infections in older patients. Some earlier studies suggest that older patients respond differently to HAART than younger patients. The objective of this study is to compare the effectiveness of HAART in older and younger HIV patients.
  
  
  METHODS
  Retrospective analysis of an observational clinical cohort.
  
  
  METHODS
  Virologic and immunologic response, progression to AIDS and mortality were compared between 670 younger patients (<40 years) and 149 older patients (> or =50 years) by t-test, Kaplan-Meier methods, and multivariate Cox proportional hazards analysis.
  
  
  RESULTS
  Compared with younger patients, older patients were more likely to be on nonnucleoside reverse transcriptase inhibitors based versus protease inhibitor based regimens (42 vs. 29%, P < 0.01). Time to HIV-1 RNA virologic suppression was less in older than in younger patients (3.2 vs. 4.4 months, P < 0.01). Immunologic response did not differ by age. Older patients had fewer AIDS-defining opportunistic infections (22 vs. 31%, P < 0.01), but higher mortality (36 vs. 27%, P = 0.04) and shorter survival (25th percentile survivor function 36.2 vs. 58.5 months, P = 0.02) than younger patients. Older age was associated with more rapid virologic suppression [adjusted hazard ratio = 1.33 (1.09-1.63)] and earlier mortality [adjusted hazard ratio = 1.56 (1.14-2.14)]. Nonnucleoside reverse transcriptase inhibitors based regimens were associated with more rapid virologic suppression [adjusted hazard ratio = 1.22 (1.03-1.44)].
  
  
  CONCLUSIONS
  Time to virologic suppression after HAART initiation was shorter in older patients, although CD4 response did not differ by age. Older patients had fewer opportunistic infections, but survival was shorter. Our data suggest a need to better understand causes of mortality in older patients.
authors.affiliation: Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287, USA.
authors.forename: Adena H
authors.initials: AH
authors.lastname: Greenbaum
authors.forename: Lucy E
authors.initials: LE
authors.lastname: Wilson
authors.forename: Jeanne C
authors.initials: JC
authors.lastname: Keruly
authors.forename: Richard D
authors.initials: RD
authors.lastname: Moore
authors.forename: Kelly A
authors.initials: KA
authors.lastname: Gebo
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000150:complications*; D000328:Adult; D000367:Age Factors; D019380:Anti-HIV Agents / Q000008:administration & dosage*; D023241:Antiretroviral Therapy, Highly Active / Q000379:methods*; D018791:CD4 Lymphocyte Count; D015331:Cohort Studies; D018450:Disease Progression; D004334:Drug Administration Schedule; D005260:Female; D015658:HIV Infections / Q000188:drug therapy* / Q000276:immunology / Q000821:virology; D015497:HIV-1 / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012189:Retrospective Studies; D014504:Urban Health; D019562:Viral Load
chemical_list: D019380:Anti-HIV Agents