Analysis of the visual status and its influencing factors of Tibetan students in China

Abstract

Objective To understand the status of vision of Tibetan students aged 7-18 in China, and to provide the theoretical basis for prevention and controlling work of short-sightedness and making relevant policies.

Methods Cross-sectional survey method was applied to collect information of the eyesight of 2 418 Tibetan students and that of gender, age and work-and-rest habit of 1 910 students, and the status of eyesight of Tibetan students was analyzed, and Logistic regression analysis method was used to probe into the influencing factors of eyesight.

Results The mean left eye visual value was (4.75±0.33), and the median was 4.75 ( P ₂₅ = 4.5, P ₇₅=5.0). The mean right eye visual value was (4.74±0.33), and the median was 4.90 ( P ₂₅ = 4.5, P ₇₅ = 5.0). 1 520 students were detected with myopia, with the detection rate of 62.9%. The prevalence of myopia among Tibetan female students was higher than that of male ( P<0.01). The detection rate of myopia was increased with age both in left and right eyes. Logistic regression model showed that students with insufficient physical education courses each week were associated with evaluated risk of myopia, compared with those with sufficient courses ( OR = 1.43, 95% CI = 1.05-1.94, P<0.05).

Conclusion The prevalence of myopia among Tibetan students aged 7-18 years old is rather high, and females are worse than males, senior students were worse than junior students. After controlling for factors like grade and gender, insufficient physical education courses at school is a risk factor of myopia.

Abstract

【摘要】 目的 了解中国7~18岁藏族学生视力现状，为学校近视防控工作开展及相关政策制定提供理论支持。 方 法 采用横断面研究方法，收集2 418名藏族学生左、右眼视力及1 910名学生性别、年龄、作息时间等信息，分析藏族学生 视力现状，采用Logistic回归分析方法探讨视力影响因素。 结果 2014年7~18岁藏族学生左眼裸眼视力平均值为（4.75± 0.33)，中位数为4.75 ( P ₂₅ = 4.5, P ₇₅ = 5.0); 右眼裸眼视力平均值为（4.74±0.33)，中位数为4.90 ( P ₂₅ = 4.5, P ₇₅ = 5.0)。检出 视力不良学生1 520名，检出率为62.9%。藏族女生视力不良率髙于男生（ P<0.01)，视力不良检出率随年龄增加而增加。 每周体育课课时不足与藏族学生双眼视力不良风险呈正性相关（ OR =1.43，95% CI = 1.05 ~ 1.94， P<0.05)。 结论 7~18岁 藏族学生视力不良率处于较髙流行水平，且女生比男生严重，髙年级学生比低年级学生严重。在控制年级、性别等因素后， 学校每周开设体育课时不足为视力不良的重要影响因素。