Abstract：Objective To analyze the prevalence of high myopia and its possible influencing factors among middle school students in urban area of Yinchuan city. Methods A cross-sectional study was carried out in middle school students in Yinchuan city. The data about the students' visual acuity and non-cycloplegic objective refraction were collected; meanwhile, a questionnaire survey was conducted. Results A total of 11,902 eyes of 5,951 middle school students from different grades were screened. The detection rate of myopia was 73.71% (8,773 eyes), with the detection rate of high myopia being 11.12% (1,324 eyes). The detection rate of emmetropia was 24.68% (2,937 eyes). The detection rate of high myopia was significantly higher in senior middle school students (16.41%, 712 eyes) than in junior ones (8.09%, 612 eyes), showing a statistically significant difference between the two groups (χ2=421.300, P=0.000). The detection rate of high myopia was higher in girls than in boys (12.06％ vs. 10.18%, χ2=48.431, P=0.000). There were 700 right eyes and 624 left eyes with high myopia(χ2=10.809, P=0.001), accounting for 5.88% and 5.24%, respectively. The average diopter of spherical equivalent refraction in the middle school students was(-7.57±1.38)D, of which that in junior and senior middle school students was(-7.48±1.25)D and (-7.65±1.47)D, respectively, without a statistically significant difference (F=2.059, P=0.068). Multivariable ordinal logistic regression analysis revealed that age, gender, family history of myopia and daily outdoor activity time were associated with the degree of myopia of the middle school students, and there were statistically significant differences in each influencing factor between groups(all P<0.05). Conclusions The severity of high myopia of the middle school students kept increasing with the increase of grade. Age, gender, family history of myopia and daily outdoor activity time are factors influencing the formation and severity of myopia; and hence, monitoring and medical intervention should be carried out during the formation of high myopia.
王文婷, 莫爱红, 张艳萍, 哈文静. 银川市城区中学生高度近视流行病学调查[J]. 实用预防医学, 2020, 27(7): 834-837.
WANG Wen-ting, MO Ai-hong, ZHANG Yan-ping, HA Wen-jing. Epidemiological survey of high myopia among middle school students in urban area of Yinchuan city. , 2020, 27(7): 834-837.
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2020, Vol. 27 
