Refractive Error in Chinese Primary and High School Students Before and Amidst COVID-19 in Tianjin
试验速览
- 阶段
- 不适用
- 入组人数
- 36,452
- 试验地点
- 1
- 主要终点
- refractive error
研究概览
简要总结
This cohort study aimed to assess the change of refractive status in Chinese school children.
详细描述
A cohort study was conducted in 96 primary and secondary schools in 16 districts of Tianjin from 2018 to 2020, including about 36452 people totally. The changes in myopia rate in 3 years were compared by a generalized estimation equation. The distribution of average equivalent spherical mirror and different regions and grades was evaluated by linear regression analysis, and the correlation between the equivalent spherical mirror and different gender, nationality, and age was evaluated.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 6 Years 至 18 Years（Child, Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •no concurrent eye disease
- •age from 6 to 18 years old
排除标准
- •significant systemic illnesses
- •ocular conditions
- •congenital corneal diseases
- •pterygium, keratoconus
- •corneal degeneration or dystrophy
- •media opacity, uveitis, glaucoma
- •history of ocular surgery
- •neurologic diseases
- •retinal disease.
结局指标
主要结局
refractive error
时间窗: change from baseline at 36 months
The changes in refractive error were compared by generalized estimation equation.
sex disparity
时间窗: change from baseline at 36 months
The changes in refractive error were compared between different sex
次要结局
未报告次要终点