Original ArticleRefractive Error in Urban and Rural Adult Chinese in Beijing
Section snippets
Subjects and Methods
The Beijing Eye Study is a population-based prospective cohort study in northern China. It was carried out in 4 communities in the urban district of Haidian in the north of central Beijing and in 3 communities in the village area of Yufa of the Daxing district south of Beijing. The study was performed in a rural area and in an urban area because the areas differ markedly in level of education, access to medical care, mobility, frequency of hereditable diseases, and way of life. In the rural
Results
Response rates were 79.30% in the rural population and 86.95% in the urban population (Table 2). Mean monthly salary (365±351 renminbi yuan [95% CI], 376–409) vs. 1781±5820 renminbi yuan [95% CI], 1521–1854), age, and level of education were significantly lower in the rural region than in the urban region (Table 1).
Taking into account the whole study population, mean refractive error measured −0.33±2.22 D (median, 0; range, −20.88 to +7.88; 95% CI, −0.37 to −0.28) (Fig 1). The distribution
Discussion
In the present Beijing Eye Study, myopia of more than −0.5 D occurred in 21.8% of subjects, and hyperopia of more than +0.5 D was found in 20.0% of subjects (Table 3, Fig 1). High myopia of more than −8 D was present in 1.5% of subjects. Myopia was more prevalent in younger subjects and was associated with urban region, higher educational background, female gender, decreasing VA, and degree of nuclear cataract. Similar figures for the prevalence of myopia have been reported in the Shihpai Eye
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Manuscript no. 2004-328.
Proprietary interest: none.