Objective To investigate the epidemiological characteristics of poor vision among primary and middle school students in Taizhou City from 2013 to 2020.Methods According to the principle of stratified cluster random sampling,one primary school,one middle school and one high school were randomly selected from each of the 9 counties(cities,districts)in Taizhou City,and the students in the school were continuously monitored from 2013 to 2020.Visual acuity was measured and evaluated according to GB/T 26343-2010 Technical Specifications for Student Health Examination.The epidemiological characteristics were analyzed by the detection rate,fixed base ratio,sequential growth rate and average growth rate.Results From 2013 to 2020,the overall poor vision rate of primary and middle school students in Taizhou was 73.0％(181 681/248 956),showing a gradual upward trend with an average annual growth rate of 0.39％.The rate of poor vision in girls(75.4％,87 667/116 240)was higher than that in boys(70.8％,94 014/132 716)with significant difference(x2=659.27,P＜0.001).The average annual growth rate of girls(0.51％)was faster than that of boys(0.28％).The rate of poor vision in high school(92.2％,72 286/78 404)was higher than that in middle school(82.1％,59 611/72 610)and primary school(50.8％,49 784/97 942)with significant differences(x2=42 109.32,P＜0.001).The annual average growth rate was the fastest in primary schools(2.49％),followed by middle schools(0.46％)and high schools(0.42％).Conclusions The rate of poor vision among primary and middle school students in Taizhou City is high,showing a gradual upward trend and a younger-age trend.It is necessary to conduct scientific prevention and control measures,especially on primary school students.
MyopiaPrimary and middle school studentsEpidemiological characteristicsYounger-age trend
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