Original articlePrevalence of Primary Angle Closure and Primary Angle-Closure Glaucoma in a Southwestern Rural Population of Japan: The Kumejima Study
Section snippets
Study Population
The Kumejima Study was a population-based epidemiologic survey of ocular diseases, especially of glaucoma, among all residents 40 years of age or older in Kumejima, Okinawa Prefecture, Japan. Kumejima is an island in southwestern Japan. This study was conducted from May 2005 through August 2006. The investigation followed the tenets of the Declaration of Helsinki and the municipal law of Kumejima Town for protecting private information. The ethics committee of Kumejima Town approved the study
Population, Participants, and Participant Rate
The number of registered residents 40 years of age or older in Kumejima was 5289, but 657 were identified as nonresidents or deceased or had relocated during the screening period. Of the remaining 4632 eligible residents, 3762 (participant rate, 81.2%) completed a screening examination in the Public Kumejima Hospital (3572 subjects) or in their own or nursing homes (190 subjects). Of the 3762 participants, 1363 were not referred for a definitive examination, but the rest (2399; 64.0%) were
Discussion
Kumejima is an island in Okinawa Prefecture in southwestern Japan. The composition of the population in Kumejima is almost identical to that of Okinawa Prefecture.18 Therefore, Kumejima was chosen for the current population-based survey because the Kumejima population is thought to represent better the population of Okinawa Prefecture. Moreover, the percentage of Kumejima residents who relocated from or to other islands or other areas in Japan was relatively low compared with residents of the
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2022, Ophthalmology GlaucomaCitation Excerpt :Primary angle closure was diagnosed when an eye with an occludable angle showed 1 or more of the following findings: an IOP of 22 mmHg or more, peripheral anterior synechiae reaching the scleral spur or beyond, a history of acute IOP elevation, or a previous diagnosis according to the participant’s reliable statement and the objective ocular signs. If an eye not diagnosed with an occludable angle showed peripheral anterior synechiae in an area with an angle width measuring Shaffer’s grade 2 or less, the eye also was diagnosed with PAC and was added secondarily to the eye group with an occludable angle.22 When an eye with an occludable angle was not diagnosed with PAC, the eye was classified as a PAC suspect.25
Manuscript no. 2011-303.
Financial Disclosure(s): The author(s) have no proprietary or commercial interest in any materials discussed in this article.
Supported by a Grant-in-Aid for Scientific Research by the Ministry of Health, Labour and Welfare, Tokyo, Japan (H18-Sensory-General-001); the Grant-in-Aid for Scientific Research (C) 17591845 from the Ministry of Education, Culture, Sports, Science and Technology, Tokyo, Japan; and a fund from the Japan National Society for the Prevention of Blindness, Tokyo, Japan.