Prevalence and Environmental Factors for Myopia Among Chinese School-aged Children and Adolescent in Tianjin
1 other identifier
observational
500,000
1 country
1
Brief Summary
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.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for all trials
Started Mar 2021
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
March 1, 2021
CompletedFirst Submitted
Initial submission to the registry
April 8, 2022
CompletedFirst Posted
Study publicly available on registry
April 20, 2022
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 1, 2022
CompletedStudy Completion
Last participant's last visit for all outcomes
December 31, 2025
CompletedNovember 29, 2022
November 1, 2022
1.8 years
April 8, 2022
November 26, 2022
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Prevalence of myopia
Myopia is defined as any eye's SER (sphere + 1/2 cylinder) of at least -0.5 diopters (D).
up to 3years
Secondary Outcomes (2)
Changes in prevalence of myopia
up to 3years
Changes of Spherical equivalent
changes from baseline at 36months
Eligibility Criteria
All school-aged children and adolescents completed the vision screening in the included school.
You may qualify if:
- aged 6 to 18 years
- no ocular diseases and systemic diseases
- consent to undergo an eye examination
You may not qualify if:
- schoolchildren unwilling to participate
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Tianjin Eye Hospital
Tianjin, Tianjin Municipality, China
Related Publications (3)
Morgan IG, French AN, Ashby RS, Guo X, Ding X, He M, Rose KA. The epidemics of myopia: Aetiology and prevention. Prog Retin Eye Res. 2018 Jan;62:134-149. doi: 10.1016/j.preteyeres.2017.09.004. Epub 2017 Sep 23.
PMID: 28951126BACKGROUNDGuo Y, Liu LJ, Xu L, Lv YY, Tang P, Feng Y, Meng M, Jonas JB. Outdoor activity and myopia among primary students in rural and urban regions of Beijing. Ophthalmology. 2013 Feb;120(2):277-83. doi: 10.1016/j.ophtha.2012.07.086. Epub 2012 Oct 23.
PMID: 23098368BACKGROUNDTenovuo J, Mielityinen H, Paunio K. The effect of dental plaque grown in the presence of xylitol or sucrose on bone resorption in vitro. Pharmacol Ther Dent. 1981;6(1-2):35-43.
PMID: 6941318BACKGROUND
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Officials
- STUDY CHAIR
yan wang
Tianjin Eye Hospital
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- COHORT
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
April 8, 2022
First Posted
April 20, 2022
Study Start
March 1, 2021
Primary Completion
December 1, 2022
Study Completion
December 31, 2025
Last Updated
November 29, 2022
Record last verified: 2022-11
Data Sharing
- IPD Sharing
- Will not share