Prevalence and Risk Factors of Refractive Error: A Cross-Sectional Study in Han and Yi Adults in Yunnan, China
Few studies have investigated the prevalence of refractive error (RE) in older adults in China, and most have focused on East China.
This study determined the prevalence and risk factors of RE in Han and Yi adults aged 40–80 years in rural and urban areas in Yunnan Province, Southwest China.
Among 1626 participants, the age-adjusted prevalence rates of myopia, hyperopia, high myopia and astigmatism were 26.35%, 19.89%, 2.64%, and 56.82%.
Compared to the Yi population, the Han population had higher prevalence of myopia (31.50% vs 16.80%), high myopia (3.34% vs 1.31%) and astigmatism (60.07% vs 50.67%) but lower prevalence of hyperopia (16.58% vs 27.37%).
Myopia was also associated with height, time spent in rural areas, undergraduate/graduate education level, compared with primary school or lower education level) and diabetes.
Compared to the Yi population, the Han population had a higher prevalence of myopia, high myopia and astigmatism but a lower risk of hyperopia.
The prevalence of myopia in the Han population in underdeveloped Southwest China was similar to that of residents in East China or of Chinese Singaporeans under urban or rural settings.