title: The Tajimi Study report 2: prevalence of primary angle closure and secondary glaucoma in a Japanese population.
abstract: OBJECTIVE
  To determine the prevalence of primary angle-closure glaucoma (PACG), secondary glaucoma (SG), and all glaucoma in a Japanese population as a part of the Tajimi Study.
  
  
  METHODS
  Population-based epidemiological survey.
  
  
  METHODS
  A random sample of residents 40 years or older from Tajimi, Japan.
  
  
  METHODS
  Each subject underwent a screening program comprising an interview and an ophthalmic examination, including Goldmann applanation tonometry, slit-lamp examination, a van Herick test, fundus photography, and a screening visual field (VF) test using frequency-doubling technology. If glaucoma was suspected, the subject was referred for a definitive examination that included slit-lamp examination, gonioscopy, intraocular pressure measurement, a VF test, and optic disc and fundus examination. A diagnosis of PACG or SG was made based on slit-lamp examination, gonioscopy, optic disc appearance, and perimetric results.
  
  
  METHODS
  Prevalences of PACG, SG, and all cases of glaucoma.
  
  
  RESULTS
  Of 3870 eligible people, 3021 (78.1%) participated in the study. Estimated prevalences of PACG and SG in those over 40 years were 0.6% (95% confidence interval [CI], 0.4%-0.9%) and 0.5% (95% CI, 0.2%-0.7%), respectively. Prevalences of all glaucoma and glaucoma/suspected glaucoma were estimated to be 5.0% (95% CI, 4.2%-5.8%) and 7.5% (95% CI, 6.5%-8.4%), respectively.
  
  
  CONCLUSIONS
  Prevalences were 0.6%, 0.5%, and 5.0%, respectively, for PACG, SG, and all glaucoma in subjects over 40 years from Tajimi, Japan.
authors.affiliation: Department of Ophthalmology, Gifu University Graduate School of Medicine, Gifu, Japan. mmc-gif@umin.ac.jp
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Aiko
authors.initials: A
authors.lastname: Iwase
authors.forename: Makoto
authors.initials: M
authors.lastname: Araie
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Haruki
authors.initials: H
authors.lastname: Abe
authors.forename: Shiroaki
authors.initials: S
authors.lastname: Shirato
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Kuwayama
authors.forename: Hiromu K
authors.initials: HK
authors.lastname: Mishima
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Shimizu
authors.forename: Goji
authors.initials: G
authors.lastname: Tomita
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Inoue
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Kitazawa
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005901:Glaucoma / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D015812:Glaucoma, Angle-Closure / Q000175:diagnosis / Q000453:epidemiology*; D006068:Gonioscopy; D006801:Humans; D007429:Intraocular Pressure; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009412:Nerve Fibers / Q000473:pathology; D009898:Optic Disk / Q000473:pathology; D009901:Optic Nerve Diseases / Q000175:diagnosis; D015995:Prevalence; D017678:Sex Distribution; D014065:Tonometry, Ocular; D014794:Visual Fields