Abstract：Objective To investigate the distribution status and influencing factors of poor vision among primary and middle school students in Hunan province so as to provide a scientific basis for government departments to develop preventive strategies. Methods Physical examination and questionnaire surveys were conducted among 8,129 students selected from Grades 4-6 in primary schools and Grades 7-12 in middle schools in Hunan province in 2017, and the data were analyzed by appropriate statistical methods. Results The overall prevalence rate of poor vision in primary and middle school students in Hunan province in 2017 was 64.9%. The prevalence rates of poor vision in primary schools, junior middle schools and senior middle schools were 44.4%, 73.2% and 78.8% respectively, showing an increasing trend with the increment of education period (χ2tendency=702.732, P<0.001). The prevalence rates of slight, moderate and severe poor vision were 6.6%, 19.9% and 38.5% respectively. The prevalence rates of slight poor vision in primary schools (8.1%), junior middle schools (6.8%) and senior middle schools (4.6%) showed a decreasing trend with the increment of education period (χ2tendency=25.452, P<0.001), while the prevalence rates of severe poor vision in primary schools (17.0%), junior middle schools (44.2%) and senior middle schools (56.3%) demonstrated an upward trend with the increment of education period (χ2tendency=870.331, P<0.001). There were statistically significant differences in the proportions of slight, moderate and severe poor vision among pupils, junior and senior middle schools (χ2=365.232, P<0.001). The proportions of slight and moderate poor vision decreased with the increment of education period, but that of severe poor vision increased. The prevalence rate of poor vision was higher in urban primary and middle school students than in rural ones (χ2=10.013, P=0.002), higher in girls than in boys (χ2=86.021, P<0.001), higher in urban girls than in urban boys (χ2=29.891, P<0.001), higher in rural girls than in rural boys (χ2=63.352, P<0.001), and higher in urban boys than in rural ones (χ2=17.228, P<0.001).Among the environmental factors influencing poor vision in primary and middle school students,spending more than 2 hours for outdoor activities per day (OR=0.725, 95%CI: 0.661-0.796) andbeing restrained to keep correct reading and writing gesture by guardians and teachers (OR=0.793, 95%CI: 0.720-0.873) were protective factors, while spending more than 2 hours for homework per day (OR=1.520, 95%CI:1.383-1.67) and spending more than 2 hours for surfing the Internet by electronic devices (OR=1.358, 95%CI:1.224-1.507) were risk factors. Conclusions The prevalence rates of poor vision and severe poor vision in primary and middle school students in Hunan province in 2017 were high, and showed an increasing trend with the increment of education period. Special attention should be paid to urban areas and female students. Measures for reducing homework and the use of electronic devices should be adopted; moreover, guardians and teachers should timely remind students to keep correct reading and writing gesture and increase outdoor activities.
王非, 李开宇, 陈艳华, 胡冀. 2017年湖南省中小学生视力不良现况及环境影响因素分析[J]. 实用预防医学, 2019, 26(8): 900-903.
WANG Fei, LI Kai-yu, CHEN Yan-hua, HU Ji. Prevalence and environmental influencing factors of poor eyesight among primary and middle school students in Hunan province, 2017. , 2019, 26(8): 900-903.
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2019, Vol. 26 
