NCT06607640

Study of the Intervention Effect of Outdoor Activity Period Patterns in Promoting Myopia Among Preschool Children

Study on the Association of Time Pattern of Outdoor Activity With Axial Length and Myopia of Preschool Children and Its Intervention

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 210 (estimated)
• Sponsor: Fangbiao Tao · Academic / Other
• Sex: All
• Age: 4 Years – 5 Years
• Healthy volunteers: Accepted

Summary

This study is a randomized controlled trial based on outdoor activity interventions at specific time periods, involving preschool children aged 4 to 5 years. It compared the axial length and myopia incidence between the intervention group and the control group at the 6th and 12th months of the intervention to determine the effect of outdoor activities at specific time periods on the prevention of myopia in preschool children. Additionally, the study investigated the association between outdoor activities at specific time periods and axial length and myopia in preschool children.

Detailed description

Preschool children with insufficient outdoor activity during specific time periods from one kindergarten were assigned to the intervention group, while those from another kindergarten with insufficient outdoor activity during specific time periods were assigned to the control group. The intervention group received an additional 1 hour of outdoor activity during a specific time period on each school day, while the control group did not receive any intervention and continued their regular routine. The intervention lasted for one year. Participants underwent multiple assessments after joining the study. These assessments took place at baseline, at the 6th month of the intervention, and at the 12th month.

Conditions

• Axial Length
• Myopia

Interventions

Type	Name	Description
BEHAVIORAL	Increase outdoor activity time during specific time periods	The specific time periods of outdoor activity found to be beneficial for myopia prevention will be used as the intervention "target," and a one-year intervention will be initiated.

Timeline

• Start date: 2024-09-21
• Primary completion: 2025-09-21
• Completion: 2025-12-21
• First posted: 2024-09-23
• Last updated: 2024-09-23