A prospective cohort study on refractive status of schoolchildren in Huangzhong District, Xining City, Qinghai Province.
10.3760/cma.j.cn112150-20220408-00337
- Author:
Qi LIN
1
;
En Tuan YANG
2
;
Li LI
1
;
Ji Feng YU
1
;
Xue LIU
1
;
Hua Xin ZUO
1
;
Man Jun LIU
1
;
Hui Hui CHU
1
;
Yin Zheng ZHAO
2
;
Jidi ZHANG
2
Author Information
1. Department of Ophthalmology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China.
2. Medical College of Pediatrics, Capital Medical University, Beijing 100069, China.
- Publication Type:Journal Article
- MeSH:
Child;
Cohort Studies;
Female;
Follow-Up Studies;
Humans;
Mydriatics;
Myopia/epidemiology*;
Ophthalmic Solutions;
Phenylephrine;
Prevalence;
Prospective Studies;
Tropicamide
- From:
Chinese Journal of Preventive Medicine
2022;56(9):1251-1256
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To determine the characteristics and progress of the visual acuity and refractive state of schoolchildren in Huangzhong District, Xining City, Qinghai Province in China. Methods: Cohort study. Department of Ophthalmology, Beijing Children's Hospital carried out a cohort study by collecting the visual acuity and refractive state of Grade 1-5 schoolchildren among 16 primary schools in Huangzhong District, Xining City, Qinghai Province in September 2020 and July 2021. Cycloplegic retinoscopy with eye drop which contained tropicamide (0.5%) and phenylephrine hydrochloride (0.5%) was performed in children with low vision(<1.0). Myopia was defined as the spherical equivalent (SE) ≤-0.5 D after cycloplegic retinoscopy. Measurement data was analyzed by t-test and enumeration data was analyzed by χ2 test. Multiple linear regression was used to analyze the influencing factors. Results: The 2 489 individuals with repeated tests in two years were included in the follow-up study, among whom the prevalence of myopia was 26.24%(653/2 489) in 2020, while 32.94% (820/2 489)respectively in 2021. The incidence of myopia in one school year from grades 1 to 5 was 11.19%(47/420), 5.44%(21/386), 6.39%(25/391), 11.52%(44/382) and 11.67%(30/257). The average SE of children in all grades in 2021 increased negatively from the previous year (Grade 1 to Grade 5 increased respectively: 0.40 D, 0.69 D, 0.62 D, 0.52 D and 0.37 D). Conclusions: The prevalence of myopia among schoolchildren in Huangzhong District, Xining City, Qinghai Province was relatively high. There were two peaks of myopia incidence in the first, fourth and fifth grades. Female, age, and the baseline of SE were the related influencing factors for myopia progression.
