Refractive Error in Chinese Students

Tianjin Eye Hospital

Status: Unknown

Conditions: Myopia

Treatments: Other: outdoor time

Study type: Observational

Funder types: Other

Identifiers

NCT05119543

2021022

Details and patient eligibility

About

This cohort study aimed to assess the change of refractive status in Chinese school children.

Full description

A cohort study was conducted in 96 primary and secondary schools in 16 districts of Tianjin from 2018 to 2020, including about 36452 people totally. The changes in myopia rate in 3 years were compared by a generalized estimation equation. The distribution of average equivalent spherical mirror and different regions and grades was evaluated by linear regression analysis, and the correlation between the equivalent spherical mirror and different gender, nationality, and age was evaluated.

Enrollment: 36,452 estimated patients

Sex: All

Ages: 6 to 18 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• no concurrent eye disease
• age from 6 to 18 years old

Exclusion criteria

• significant systemic illnesses
• ocular conditions
• congenital corneal diseases
• pterygium, keratoconus
• corneal degeneration or dystrophy
• media opacity, uveitis, glaucoma
• history of ocular surgery
• neurologic diseases
• retinal disease.

Trial design

36,452 participants in 1 patient group

Grade

Description:

The changes in myopia rate in 3 years were compared by generalized estimation equation in different grades

Treatment:

Other: outdoor time