The Prevalence of Glaucoma in Adult Rural Chinese Populations of the Bai Nationality in Dali: The Yunnan Minority Eye Study

Abstract

PURPOSE. We evaluated the prevalence of glaucoma in adults of the Bai Nationality populations in rural China. METHODS.A population-based survey of Chinese Bai Nationality aged ‡50 years from randomly selected block groups in southwestern China was conducted. Eligible persons were invited to local examination sites for a complete ophthalmic examination. Glaucoma was diagnosed using the International Society of Geographical and Epidemiological Ophthalmology Classification scheme.RESULTS. In the study, 2133 subjects (77.8% participation rate) were examined, with a crude prevalence of all glaucoma of 2.2% (95% confidence interval [CI] 1.6%-2.9%). Primary open angle glaucoma (POAG) was found in 1.0% of cases (95% CI 0.6%-1.6%) and primary angle-closure glaucoma (PACG) in 0.9% (95% CI 0.6%-1.4%). The prevalence of all glaucoma was significantly higher in older people and women. Mean intraocular pressure (IOP) was 16.17 6 3.74 mm Hg (97.5th and 99.5th percentiles, 24 mm Hg and 30 mm Hg, respectively). The mean vertical cup-to-disc ratio (VCDR) was 0.43 6 0.17 (97.5th and 99.5th percentiles 0.7 and 0.8, respectively). Unilateral blindness was found in 80% of PACG, compared to only 36.3% of POAG cases.CONCLUSIONS. Prevalence of POAG is similar to PACG in the ethnic Bai population living in rural southwestern China. PACG has a worse visual impairment and prognosis compared to POAG. (Invest Ophthalmol Vis Sci. 2012;53:3221-3225)

Five-Year Incidence and Predictors for Pterygium in a Rural Community in China

“…In a previous report, we have described the detailed methodology of YMES, [19][20][21][22] and the prevalence of pterygium in the baseline survey conducted in 2010, in Bai ethnicity. 19 In brief, random cluster sampling strategies were used to select ethnic Bai adults, aged 50 years or older, living in a rural community in the Yunnan Province located in southwest China (eastern longitude 99.589 and northern latitude 25.259).…”

The Prevalence and the Incidence of Diagnosed Open-Angle Glaucoma and Diagnosed Angle-Closure Glaucoma: Changes From 2001 to 2010

“…5 Open-angle glaucoma (OAG) is the most prevalent form of glaucoma in Western countries and in urban areas of China and among ethnic Chinese in urban areas of Singapore, whereas angle-closure glaucoma (ACG) is the most common in mainland China from the results of Cheng's meta-analysis study. [5][6][7][8] The Taiwan National Health Insurance (NHI) program is a mandatory single-payer health insurance system in which all citizens are obliged to participate. The NHI program was implemented in 1995 and provides almost universal health coverage.…”

Detection of Glaucoma and Its Association With Diabetic Retinopathy in a Diabetic Retinopathy Screening Program

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