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Guangzhou Outdoor Activity Longitudinal Study

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ClinicalTrials.gov Identifier: NCT00848900
Recruitment Status : Unknown
Verified October 2010 by Sun Yat-sen University.
Recruitment status was:  Enrolling by invitation
First Posted : February 20, 2009
Last Update Posted : November 22, 2010
Information provided by:
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.

Condition or disease Intervention/treatment Phase
Myopia Behavioral: Outdoor activity Not Applicable

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.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 2000 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: A Controlled Clinical Trial of the Effect of Increases Time Outdoors in the Prevention of Juvenile-onset Myopia in Chinese Children
Study Start Date : April 2009
Estimated Primary Completion Date : April 2012
Estimated Study Completion Date : July 2012

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
No Intervention: Control
Experimental: Outdoor activity
Adding 1 hour outdoor time into school curricula
Behavioral: Outdoor activity
Adding 1 hour outdoor time into school curricula

Primary Outcome Measures :
  1. Cycloplegic refraction [ Time Frame: 1 year ]

Secondary Outcome Measures :
  1. Visual acuity [ Time Frame: 6 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • All the students in Grade 1

Exclusion Criteria:

  • No

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00848900

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China, Guangdong
Zhongshan Ophthalmic Center
Guangzhou, Guangdong, China, 510060
Sponsors and Collaborators
Sun Yat-sen University
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Principal Investigator: Mingguang He, PhD, MD Zhongshan Ophthalmic Center, Sun Yat-sen University
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
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Responsible Party: Mingguang He, Zhongshan Ophthalmic Center, ZOC
ClinicalTrials.gov Identifier: NCT00848900    
Other Study ID Numbers: GOAL2009
First Posted: February 20, 2009    Key Record Dates
Last Update Posted: November 22, 2010
Last Verified: October 2010
Additional relevant MeSH terms:
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Refractive Errors
Eye Diseases