Guangzhou Outdoor Activity Longitudinal Study

Not Applicable

• Conditions: Myopia
• Interventions: Behavioral: Outdoor activity

• Registration Number: NCT00848900
• Lead Sponsor: Sun Yat-sen University

Brief Summary

The purpose of this study is to assess whether outdoor activities are effective in preventing the development and progression of juvenile-onset myopia in Chinese children.

Detailed Description

1. To determine if increased engagement in outdoor activities reduces the development and progression of myopia in Chinese school children.

2. To identify the risk factors associated with the development and progression of juvenile-onset myopia.

3. To characterize the interaction between refractive error and education.

Study Timeline

• Study First Submitted: 2009-02-19
• Study First Submitted QC: 2009-02-19
• Study First Posted: 2009-02-20
• Study Start: 2009-04
• Status Verified: 2010-10
• Last Update Submitted: 2010-11-19
• Last Update Posted: 2010-11-22
• Primary Completion: 2012-04
• Study Completion: 2012-07

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 2000

Inclusion Criteria

• All the students in Grade 1

Exclusion Criteria

• No

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Outdoor activity	Outdoor activity	Adding 1 hour outdoor time into school curricula

Primary Outcome Measures

Name	Time	Method
Cycloplegic refraction	1 year

Secondary Outcome Measures

Name	Time	Method
Visual acuity	6 months

Trial Locations

Locations (1)

Zhongshan Ophthalmic Center; 🇨🇳 Guangzhou, Guangdong, China