Refractive Error in Chinese Students
- Conditions
- Myopia
- Interventions
- Other: outdoor time
- Registration Number
- NCT05119543
- Lead Sponsor
- Tianjin Eye Hospital
- Brief Summary
This cohort study aimed to assess the change of refractive status in Chinese school children.
- Detailed Description
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.
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 36452
- no concurrent eye disease
- age from 6 to 18 years old
- 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.
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Grade outdoor time The changes in myopia rate in 3 years were compared by generalized estimation equation in different grades
- Primary Outcome Measures
Name Time Method refractive error change from baseline at 36 months The changes in refractive error were compared by generalized estimation equation.
sex disparity change from baseline at 36 months The changes in refractive error were compared between different sex
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Tianjin Eye Hospital
🇨🇳Tianjin, China