Prevalence and Environmental Factors for Myopia Among Chinese School-aged Children and Adolescent in Tianjin

Recruiting

• Conditions: Myopia; Refractive Errors

• Registration Number: NCT05336799
• Lead Sponsor: Tianjin Eye Hospital

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.

Detailed Description

The high prevalence of myopia has become a global public health problem, especially in East and South Asian countries. It's still not clear for the prevalence and progression of myopia associated with social environmental factors. Thus, the investigators will conducted a long-term observational study to the effect of the socioeconomics, medical resources and school-related environmental parameters and others on the prevalence and progression of myopia among Chinese school-aged children and adolescent.

Study Timeline

• Study Start: 2021-03-01
• Study First Submitted: 2022-04-08
• Study First Submitted QC: 2022-04-14
• Study First Posted: 2022-04-20
• Status Verified: 2022-11
• Last Update Submitted: 2022-11-26
• Last Update Posted: 2022-11-29
• Primary Completion: 2022-12-01
• Study Completion: 2025-12-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 500000

Inclusion Criteria

• aged 6 to 18 years
• no ocular diseases and systemic diseases
• consent to undergo an eye examination

Exclusion Criteria

• schoolchildren unwilling to participate

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Prevalence of myopia	up to 3years	Myopia is defined as any eye's SER (sphere + 1/2 cylinder) of at least -0.5 diopters (D).

Secondary Outcome Measures

Name	Time	Method
Changes in prevalence of myopia	up to 3years	Myopia is defined as any eye's SER (sphere + 1/2 cylinder) of at least -0.5 diopters (D).
Changes of Spherical equivalent	changes from baseline at 36months	Changes of Spherical equivalent

Trial Locations

Locations (1)

Tianjin Eye Hospital; 🇨🇳 Tianjin, Tianjin, China