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

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

NA

Total Enrollment

210 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-09-21

Study Completion Date

2025-12-21

Brief Summary

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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.

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Detailed Description

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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

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Axial Length Myopia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Intervention: Increase outdoor activity time during specific time periods.

The intervention group received an additional 1 hour of outdoor activity during a specific time period on each school day, with the intervention lasting for one year.

Group Type EXPERIMENTAL

Increase outdoor activity time during specific time periods

Intervention Type BEHAVIORAL

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.

continued their regular indoor or outdoor routine

The control group continued their regular indoor or outdoor routine.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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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.

Intervention Type BEHAVIORAL

Other Intervention Names

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Intervention with a specific outdoor activity model

Eligibility Criteria

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Inclusion Criteria

* Students and their families were informed and voluntarily participated in the study, with parents signing the informed consent form.
* Able to cooperate with eye examinations and questionnaires.

Exclusion Criteria

* Communication barriers, unable to cooperate.
* Strabismus, amblyopia, or any other ocular or systemic diseases that may affect refractive development.
* Children currently using orthokeratology lenses or rigid contact lenses.
* Using other interventions (such as acupuncture, massage, medication, ear acupuncture, etc.) to control myopia, apart from school eye exercises.

Minimum Eligible Age

4 Years

Maximum Eligible Age

5 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes