A 3-year Cross-sectional Assessment of the Tianjin Child and Adolescent Large-scale Eye Study
1 other identifier
observational
126,810
1 country
1
Brief Summary
This is a school-based, cross-sectional study to assess the incidence and prevalence, risk factors of myopia among schoolchildren in both eye-use environment, eye-use habits, lifestyle, and family and subjective factors before and during COVID-19. Large population and representative study subjects. Environmental exposure and daily within and out-of-school activities will be evaluated in a random subgroup.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P75+ for all trials
Started Jul 2019
Typical duration 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
July 1, 2019
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 31, 2021
CompletedStudy Completion
Last participant's last visit for all outcomes
December 31, 2021
CompletedFirst Submitted
Initial submission to the registry
July 9, 2023
CompletedFirst Posted
Study publicly available on registry
August 1, 2023
CompletedAugust 1, 2023
July 1, 2023
2.5 years
July 9, 2023
July 21, 2023
Conditions
Outcome Measures
Primary Outcomes (2)
Prevalence of myopia
Myopia was defined as an equivalent spherical refraction ≤ -0.50D in either eye
One day measurement
Prevalence of high myopia
High myopia was defined as an equivalent spherical refraction ≤ -6.00D in either eye
One day measurement
Eligibility Criteria
All 6-18-year students with no significant systemic or eye diseases are eligible for vision screening
You may qualify if:
- All 6-18 years students
You may not qualify if:
- No eye diseases such as cataracts, glaucoma, keratoconus, etc.
- No psychiatric disorders
- Astigmatism ≤ -6.00D
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Tianjin Eye Hospital
Tianjin, Tianjin Municipality, China
Related Publications (3)
Holden BA, Fricke TR, Wilson DA, Jong M, Naidoo KS, Sankaridurg P, Wong TY, Naduvilath TJ, Resnikoff S. Global Prevalence of Myopia and High Myopia and Temporal Trends from 2000 through 2050. Ophthalmology. 2016 May;123(5):1036-42. doi: 10.1016/j.ophtha.2016.01.006. Epub 2016 Feb 11.
PMID: 26875007RESULTModjtahedi BS, Abbott RL, Fong DS, Lum F, Tan D; Task Force on Myopia. Reducing the Global Burden of Myopia by Delaying the Onset of Myopia and Reducing Myopic Progression in Children: The Academy's Task Force on Myopia. Ophthalmology. 2021 Jun;128(6):816-826. doi: 10.1016/j.ophtha.2020.10.040. Epub 2020 Dec 30.
PMID: 33388160RESULTHu Y, Zhao F, Ding X, Zhang S, Li Z, Guo Y, Feng Z, Tang X, Li Q, Guo L, Lu C, Yang X, He M. Rates of Myopia Development in Young Chinese Schoolchildren During the Outbreak of COVID-19. JAMA Ophthalmol. 2021 Oct 1;139(10):1115-1121. doi: 10.1001/jamaophthalmol.2021.3563.
PMID: 34529002RESULT
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Study Officials
- STUDY DIRECTOR
Yan Wang, director
Tianjin Eye Hospital and Eye Institute, Nankai University Affiliated Eye Hospital
Study Design
- Study Type
- observational
- Observational Model
- CASE ONLY
- Time Perspective
- CROSS SECTIONAL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
July 9, 2023
First Posted
August 1, 2023
Study Start
July 1, 2019
Primary Completion
December 31, 2021
Study Completion
December 31, 2021
Last Updated
August 1, 2023
Record last verified: 2023-07
Data Sharing
- IPD Sharing
- Will not share