The Prevalence And Influencing Factors Of Poor Vision Among Middle School Students In Shanghai

Objective To describe the prevalence of the poor visual acuity in middle school students in Xuhui District of Shanghai,and explore the possible influencing factors,providing relevant evidences for reducing the prevalence of poor visual acuity of middle school students.Methods Cluster random sampling was used and all students from two middle schools in Lingyun Street of Xuhui District were included.Data was double-entered with Epi Data3.1and analyzed with Stata13.0.The "Student health status and Influencing Factors Questionnaire(Student)" issued by China CDC were used to investigate the health and Dietary habit of students in two schools.According to the2010 National Handbook of Student Physical Health Research and the Technical Specifications for Student Health Examination,the international standard logarithmic visual acuity chart was adopted for visual acuity examination.Diagnostic criteria for detection of myopia were: spherical equivalent for myopia is-0.5 diopters [D] or less-3.00D<S≤-0.50 D for low myopia,-6.00D<S≤-3.00 D for moderate myopia,S≤-6.00 D for high myopia,and higher level of myopia was used when the results of the two eyes were inconsistent.And the subjects with hyperopia were not included.Descriptive analyses were used to describe the distribution of analytic sample and the Nonparametric tests were employed to compare different levels of myopia between subgroups.In addition,the univariate logistic regression models were conducted to analyze the potential influencing factors for myopia among middle school students.Results 1.Among 1346 middle school students in Xuhui District of Shanghai,only 15.23% of subjects were detected with normal vision,and the proportions of students with mildly,moderately and severely poor eyesight were 47.25%,33.95%and 3.57%,respectively.2.The nonparametric test presented significant differences in the distributions of low,moderate and high myopia between some characteristics,such as gender,grade,walking and reading,reduced exercise time due to review of lessons,sitting time,average daily sleep time and parents’ nearsightedness.The nonparametric test presented no significant differences in the distributions of low,moderate and high myopia between some characteristics,for example drinking sugar-sweetened beverages,average daily eating eggs.3.Univariate logistic regression illustrated that there is significant differences in the distributions of low,moderate and high myopia between many characteristics,such as gender,grade,BMI,average daily sleep time and parents’ nearsightedness.In addition,distributive differences were found in eye hygiene(walking and reading,reduced exercise time due to review of lessons).Multivariate logistic regression illustrated that there is significant differences in the distributions of low,moderate and high myopia between some characteristics,such as gender,grade,BMI,parents’ nearsightedness.Conclusion In china,the prevalence of Xuhui district refractive errors is in a higher level.The students are focused on girls,parents’ nearsightedness,the seniors,reduced exercise time due to review of lessons,drinking sugar-sweetened beverages weekly,walking and reading,BMI for lower.These students are prevented to suffers from nearsight.In the future,regular lectures on eye hygiene should be given in the intervention of refractive error,and dietary adjustments should be made to reduce sweet foods.