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Guangzhou Outdoor Activity Longitudinal Study

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified October 2010 by Sun Yat-sen University.
Recruitment status was:  Enrolling by invitation
Sponsor:
ClinicalTrials.gov Identifier:
NCT00848900
First Posted: February 20, 2009
Last Update Posted: November 22, 2010
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
Sun Yat-sen University
  Purpose
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 Intervention
Myopia Behavioral: Outdoor activity

Study Type: Interventional
Study Design: 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

Further study details as provided by Sun Yat-sen University:

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

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

Estimated Enrollment: 2000
Study Start Date: April 2009
Estimated Study Completion Date: July 2012
Estimated Primary Completion Date: April 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
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

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.
  Eligibility

Information from the National Library of Medicine

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

Inclusion Criteria:

  • All the students in Grade 1

Exclusion Criteria:

  Contacts and Locations
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


Locations
China, Guangdong
Zhongshan Ophthalmic Center
Guangzhou, Guangdong, China, 510060
Sponsors and Collaborators
Sun Yat-sen University
Investigators
Principal Investigator: Mingguang He, PhD, MD Zhongshan Ophthalmic Center, Sun Yet-sen University
  More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Mingguang He, Zhongshan Ophthalmic Center, ZOC
ClinicalTrials.gov Identifier: NCT00848900     History of Changes
Other Study ID Numbers: GOAL2009
First Submitted: February 19, 2009
First Posted: February 20, 2009
Last Update Posted: November 22, 2010
Last Verified: October 2010

Additional relevant MeSH terms:
Myopia
Refractive Errors
Eye Diseases