Prevalence and Environmental Factors for Myopia Among Chinese School-aged Children and Adolescent in Tianjin
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 500,000
- 试验地点
- 1
- 主要终点
- Prevalence of myopia
研究概览
简要总结
The high prevalence of myopia has become a global public health problem. The study amied to investigate the prevalence and progression of myopia associated with social environmental factors in Tianjin, a Chinese megacity in north China.
详细描述
The high prevalence of myopia has become a global public health problem, especially in East and South Asian countries. It's still not clear for the prevalence and progression of myopia associated with social environmental factors. Thus, the investigators will conducted a long-term observational study to the effect of the socioeconomics, medical resources and school-related environmental parameters and others on the prevalence and progression of myopia among Chinese school-aged children and adolescent.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
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
- •aged 6 to 18 years
- •no ocular diseases and systemic diseases
- •consent to undergo an eye examination
排除标准
- •schoolchildren unwilling to participate
结局指标
主要结局
Prevalence of myopia
时间窗: up to 3years
Myopia is defined as any eye's SER (sphere + 1/2 cylinder) of at least -0.5 diopters (D).
次要结局
- Changes in prevalence of myopia(up to 3years)
- Changes of Spherical equivalent(changes from baseline at 36months)