title: Association of ocular cataracts with inhaled and oral steroid therapy during long-term treatment of asthma.
abstract: BACKGROUND
  Posterior subcapsular cataracts (PSCs) have been reported to occur in some asthmatic patients treated with inhaled steroids.
  
  
  METHODS
  We studied the associations between the occurrence of PSCs and inhaled and oral steroid therapy in 48 adults in a cross-sectional survey by slit lamp. Accurate records of the patients' long-term usage of these drugs were available: 9.2 +/- 5.2 years for inhaled steroid and 9.1 +/- 9.3 years for prednisone (mean +/- SD). Their current inhaled steroid dosage averaged 1.46 +/- 0.85 mg/day (range, 0 to 3.2 mg/day).
  
  
  RESULTS
  Twenty-seven percent of the group had PSCs. The occurrence of PSCs correlated with the current daily dose and duration of prednisone use (p = 0.002 and p = 0.01, respectively), but not with the dose or duration of inhaled steroid treatment. As judged by multiple logistic regression analysis, neither the particular inhaled steroid drug used, nor its daily dose or cumulative dose, nor the additional nonsteroidal risk factors for PSCs also present in some of these patients contributed significantly to their risk of developing PSCs.
  
  
  CONCLUSIONS
  The findings do not exclude the possibility that inhaled steroid therapy might lead to PSCs if a person has an exceptionally high inherent susceptibility. However, in the asthmatic population at large, the risk appears negligible, even if high doses of inhaled steroid are administered.
authors.affiliation: Department of Medicine, Victoria Hospital, London, Ontario, Canada.
authors.forename: J H
authors.initials: JH
authors.lastname: Toogood
authors.forename: A E
authors.initials: AE
authors.lastname: Markov
authors.forename: J
authors.initials: J
authors.lastname: Baskerville
authors.forename: C
authors.initials: C
authors.lastname: Dyson
mesh_terms: D000280:Administration, Inhalation; D000284:Administration, Oral; D000368:Aged; D001249:Asthma / Q000188:drug therapy*; D002386:Cataract / Q000139:chemically induced*; D003430:Cross-Sectional Studies; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011241:Prednisone / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use; D012044:Regression Analysis; D013256:Steroids / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D013997:Time Factors
chemical_list: D013256:Steroids; D011241:Prednisone