Environmental Health and Myopia Prevention and Control
1 other identifier
observational
100,000
1 country
1
Brief Summary
Myopia is one of the major causes of low visual acuity during childhood. It is generally more prevalent in urban areas than in rural areas. Current evidence does not address our understanding of the myopia incidence and development and associated risk geographic factors, such as green spaces. Therefore, our study aimed to evaluate the association between geographic factors and myopia base on a population-based large-scaled cohort design.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for all trials
Started Jan 2016
Longer than P75 for all trials
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
January 1, 2016
CompletedFirst Submitted
Initial submission to the registry
November 11, 2019
CompletedFirst Posted
Study publicly available on registry
November 13, 2019
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 30, 2019
CompletedStudy Completion
Last participant's last visit for all outcomes
December 30, 2021
CompletedFebruary 25, 2020
February 1, 2020
4 years
November 11, 2019
February 22, 2020
Conditions
Outcome Measures
Primary Outcomes (1)
the changes of spherical equivalent refractive (RSE)
A multi-linear regression was used.
up to 3 years
Eligibility Criteria
A prospective longitudinal cohort study of schoolchildren who studied in the 1st to 4th grades was performed.
You may qualify if:
- schoolchildren in the 1st to 4th grades
You may not qualify if:
- schoolchildren unwilling to participate
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Zhongshan Ophthalmic Center, Sun Yat-sen University
Guangzhou, Guangdong, 510000, China
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- COHORT
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Principal Investigator
Study Record Dates
First Submitted
November 11, 2019
First Posted
November 13, 2019
Study Start
January 1, 2016
Primary Completion
December 30, 2019
Study Completion
December 30, 2021
Last Updated
February 25, 2020
Record last verified: 2020-02