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Guangzhou Outdoor Activity Longitudinal Study

This study is enrolling participants by invitation only.
Sponsor:
Information provided by:
Sun Yat-sen University
ClinicalTrials.gov Identifier:
NCT00848900
First received: February 19, 2009
Last updated: November 19, 2010
Last verified: October 2010

February 19, 2009
November 19, 2010
April 2009
April 2012   (final data collection date for primary outcome measure)
Cycloplegic refraction [ Time Frame: 1 year ] [ Designated as safety issue: No ]
Visual Acuity [ Time Frame: 6 months ] [ Designated as safety issue: No ]
Complete list of historical versions of study NCT00848900 on ClinicalTrials.gov Archive Site
Visual acuity [ Time Frame: 6 months ] [ Designated as safety issue: No ]
Refractive error [ Time Frame: 1 year ] [ Designated as safety issue: No ]
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: 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
Not Provided

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

Inclusion Criteria:

  • All the students in Grade 1

Exclusion Criteria:

  • No
Both
Not Provided
No
Contact information is only displayed when the study is recruiting subjects
China
 
NCT00848900
GOAL2009
Yes
Mingguang He, Zhongshan Ophthalmic Center, ZOC
Sun Yat-sen University
Not Provided
Principal Investigator: Mingguang He, PhD, MD Zhongshan Ophthalmic Center
Sun Yat-sen University
October 2010

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