title: Iatrogenic risk factors for cytomegalovirus retinitis.
abstract: BACKGROUND
  To determine the iatrogenic risk factors for cytomegalovirus (CMV) retinitis in patients with the acquired immunodeficiency syndrome (AIDS).
  
  
  METHODS
  The case-control study included 120 patients with CMV retinitis and 159 patients without CMV retinitis, all of whom had AIDS and CD4 counts less than 50 cells/microL at the time of diagnosis of retinitis or at the defined corresponding date in the controls. Iatrogenic risk factors studied were corticosteroid use, treatment with chemotherapy, treatment with radiotherapy, and blood transfusions.
  
  
  RESULTS
  Among the risk factors studied, only steroid use was predictive of CMV retinitis (odds ratio 6.41, 95% confidence interval 2.35-17.51). Based on this study, the use of steroids systemically elevated the risk of CMV retinitis.
authors.affiliation: University of Ottawa Eye Institute, Ottawa, Ontario. whodge@ottawahospital.on.ca
authors.forename: William G
authors.initials: WG
authors.lastname: Hodge
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Boivin
authors.forename: Stanley H
authors.initials: SH
authors.lastname: Shapiro
authors.forename: Kirtida C
authors.initials: KC
authors.lastname: Shah
authors.forename: Michel A
authors.initials: MA
authors.lastname: Dionne
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D000328:Adult; D000998:Antiviral Agents / Q000627:therapeutic use; D001803:Blood Transfusion; D018791:CD4 Lymphocyte Count; D016022:Case-Control Studies; D017726:Cytomegalovirus Retinitis / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D005938:Glucocorticoids / Q000627:therapeutic use; D006801:Humans; D007049:Iatrogenic Disease; D008297:Male; D016017:Odds Ratio; D009864:Ontario / Q000453:epidemiology; D011878:Radiotherapy; D012307:Risk Factors
chemical_list: D000998:Antiviral Agents; D005938:Glucocorticoids