Trials / Unknown
UnknownNCT05119543
Refractive Error in Chinese Students
Refractive Error in Chinese Primary and High School Students Before and Amidst COVID-19 in Tianjin
- Status
- Unknown
- Phase
- —
- Study type
- Observational
- Enrollment
- 36,452 (estimated)
- Sponsor
- Tianjin Eye Hospital · Academic / Other
- Sex
- All
- Age
- 6 Years – 18 Years
- Healthy volunteers
- Accepted
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.
Conditions
Interventions
| Type | Name | Description |
|---|---|---|
| OTHER | outdoor time | This cohort study aimed to assess the change of refractive status in Chinese school children under different outdoor time |
Timeline
- Start date
- 2018-01-01
- Primary completion
- 2021-12-31
- Completion
- 2021-12-31
- First posted
- 2021-11-15
- Last updated
- 2021-11-15
Locations
1 site across 1 country: China
Source: ClinicalTrials.gov record NCT05119543. Inclusion in this directory is not an endorsement.