Abstract
Few studies have investigated the prevalence of myopia in Northwest China. This cross-sectional study aimed to investigate the prevalence and associated factors of myopia and high myopia in adults aged 40–80 years in the Han and Yugur populations living in Gansu Province, Northwest China. A total of 3,845 participants were included. The overall age- and sex-adjusted prevalence of myopia (spherical equivalent (SE) < −0.5 D), high myopia (SE < −6.0 D) and hyperopia (SE > + 0.5 D) were 16.4%, 0.7% and 26.2% in Yugur participants, respectively, and 34.3%, 5.0% and 19.2% in Han participants, respectively. The prevalence of myopia and high myopia in Han participants was significantly higher than that in Yugur participants (both P < 0.001). Yugur population, birth in rural areas, smoking history and outdoor work were found to be negatively associated with myopia. Higher education level and a family history of myopia were found to be positively associated with myopia in the study population. High myopia was negatively associated with Yugur population, aging, birth in rural areas and was positively associated with a family history of myopia. This study provided valuable information regarding the environmental risk factors of myopia and revealed an ethnic disparity in the prevalence of myopia in Gansu Province, Northwest China.
Highlights
Few studies have investigated the prevalence of myopia in Northwest China
Our study is the first to investigate the prevalence of myopia and high myopia in the Yugur population, who live in Gansu Province
Our study explored the prevalence of myopia in Han and Yugur adults aged 40–80 years in Gansu Province, Northwest China
Summary
Few studies have investigated the prevalence of myopia in Northwest China This cross-sectional study aimed to investigate the prevalence and associated factors of myopia and high myopia in adults aged 40–80 years in the Han and Yugur populations living in Gansu Province, Northwest China. This study provided valuable information regarding the environmental risk factors of myopia and revealed an ethnic disparity in the prevalence of myopia in Gansu Province, Northwest China. Our study is the first to investigate the prevalence of myopia and high myopia in the Yugur population, who live in Gansu Province. This study aimed to address the gap in current knowledge on the prevalence of myopia among Yugur and Han adults, and provide further understanding of risk factors of myopia among population with ethnic diversity
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