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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
February 19, 2009
February 20, 2009
November 22, 2010
April 2009
April 2012   (Final data collection date for primary outcome measure)
Cycloplegic refraction [ Time Frame: 1 year ]
Visual Acuity [ Time Frame: 6 months ]
Complete list of historical versions of study NCT00848900 on ClinicalTrials.gov Archive Site
Visual acuity [ Time Frame: 6 months ]
Refractive error [ Time Frame: 1 year ]
Not Provided
Not Provided
 
Guangzhou Outdoor Activity Longitudinal Study
A Controlled Clinical Trial of the Effect of Increases Time Outdoors in the Prevention of Juvenile-onset Myopia in Chinese Children
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.
  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.
Interventional
Not Provided
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Myopia
Behavioral: Outdoor activity
Adding 1 hour outdoor time into school curricula
  • No Intervention: Control
  • Experimental: Outdoor activity
    Adding 1 hour outdoor time into school curricula
    Intervention: Behavioral: Outdoor activity

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Unknown status
2000
July 2012
April 2012   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • All the students in Grade 1

Exclusion Criteria:

Sexes Eligible for Study: All
Child, Adult, Senior
No
Contact information is only displayed when the study is recruiting subjects
China
 
 
NCT00848900
GOAL2009
Yes
Not Provided
Not Provided
Mingguang He, Zhongshan Ophthalmic Center, ZOC
Sun Yat-sen University
Not Provided
Principal Investigator: Mingguang He, PhD, MD Zhongshan Ophthalmic Center, Sun Yet-sen University
Sun Yat-sen University
October 2010

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP