Refractive Error in Chinese Students

November 11, 2021 updated by: Tianjin Eye Hospital

Refractive Error in Chinese Primary and High School Students Before and Amidst COVID-19 in Tianjin

This cohort study aimed to assess the change of refractive status in Chinese school children.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

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.

Study Type

Observational

Enrollment (Anticipated)

36452

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • China
      • Tianjin, China, 300020
        • Recruiting
        • Tianjin Eye Hospital
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

6 years to 18 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

This large-scale cohort study was conducted in 36452 schoolchildren on myopia development among schoolchildren in 96 elementary and high schools in 16 districts of Tianjin in China.

Description

Inclusion Criteria:

  • no concurrent eye disease
  • age from 6 to 18 years old

Exclusion Criteria:

  • 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 Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Grade
The changes in myopia rate in 3 years were compared by generalized estimation equation in different grades
Other: outdoor time
This cohort study aimed to assess the change of refractive status in Chinese school children under different outdoor time

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
refractive error
Time Frame: change from baseline at 36 months
The changes in refractive error were compared by generalized estimation equation.
change from baseline at 36 months
sex disparity
Time Frame: change from baseline at 36 months
The changes in refractive error were compared between different sex
change from baseline at 36 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Tianjin Eye Hospital

Investigators

  • Study Chair: Yan Wang, director, Tianjin Eye Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2018

Primary Completion (Anticipated)

December 31, 2021

Study Completion (Anticipated)

December 31, 2021

Study Registration Dates

First Submitted

November 1, 2021

First Submitted That Met QC Criteria

November 11, 2021

First Posted (Actual)

November 15, 2021

Study Record Updates

Last Update Posted (Actual)

November 15, 2021

Last Update Submitted That Met QC Criteria

November 11, 2021

Last Verified

November 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2021022

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Myopia

Clinical Trials on outdoor time

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Serbia

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe