The Tajimi Study report 2: prevalence of primary angle closure and secondary glaucoma in a Japanese population.
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.
Yamamoto
Tetsuya
T
Department of Ophthalmology, Gifu University Graduate School of Medicine, Gifu, Japan. mmc-gif@umin.ac.jp
Iwase
Aiko
A
Araie
Makoto
M
Suzuki
Yasuyuki
Y
Abe
Haruki
H
Shirato
Shiroaki
S
Kuwayama
Yasuaki
Y
Mishima
Hiromu K
HK
Shimizu
Hiroyuki
H
Tomita
Goji
G
Inoue
Yoichi
Y
Kitazawa
Yoshiaki
Y
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