title: Population-based prevalence of optic disc haemorrhages in elderly Japanese.
abstract: OBJECTIVE
  To estimate the population-based prevalence of disc haemorrhages (DHs) in an elderly Japanese population and evaluate related factors including optic disc morphology.
  
  
  METHODS
  Colour fundus photographs were taken during the screening examination of the Tajimi Study, during which 3021 of 3870 eligible residents of the city aged 40 years or older were screened (response rate, 78.1%). All fundus photographs were graded by one masked examiner to determine the presence of DHs.
  
  
  RESULTS
  Good quality fundus photographs were available for both eyes of 2761 subjects. DHs were found in at least one eye of 34 subjects (1.2%; 95% confidence interval (CI) 0.8-1.6%). The prevalence was 14.0% (95% CI, 8.0-19.9%), 9.7% (2.9-16.6%), and 0.4% (0.1-0.6%) in subjects with definitive glaucoma, glaucoma suspects, and subjects without glaucoma, respectively. Logistic regression analyses indicated that DHs were associated with glaucoma (P<0.001), glaucoma suspects (P<0.001), and older age (P=0.032). No Heidelberg Retina Tomograph parameters differed between subjects with and without DHs.
  
  
  CONCLUSIONS
  The prevalence of DHs was 1.2% in an elderly Japanese population, which was similar to other population studies. In addition to glaucoma, older age was associated with higher prevalence of DHs.
authors.affiliation: Department of Ophthalmology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan. tomidokoro-tky@ umin.ac.jp
authors.forename: A
authors.initials: A
authors.lastname: Tomidokoro
authors.forename: A
authors.initials: A
authors.lastname: Iwase
authors.forename: M
authors.initials: M
authors.lastname: Araie
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Kitazawa
mesh_terms: D000368:Aged; D044466:Asian People; D005260:Female; D005901:Glaucoma / Q000150:complications*; D006801:Humans; D007429:Intraocular Pressure; D007564:Japan / Q000453:epidemiology; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009898:Optic Disk / Q000473:pathology; D009901:Optic Nerve Diseases / Q000150:complications / Q000453:epidemiology* / Q000503:physiopathology; D015995:Prevalence; D012166:Retinal Hemorrhage / Q000150:complications / Q000453:epidemiology*; D012307:Risk Factors