ArticleBMC ophthalmology2020
Prevalence of reduced visual acuity among school-aged children and adolescents in 6 districts of Changsha city: a population-based survey.
Article in BMC ophthalmology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
4 citing papers in PubMed, 3 citations in OpenAlex.
- Article
- Article
- Effects of physical activity and use of digital devices on visual acuity in children and adolescents during the COVID-19 pandemic: A cross-sectional study.Frontiers in public health · 2022Article
- Evaluation and application of a Chinese version symptom questionnaire for visual dysfunctions (CSQVD) in school-age children.Advances in ophthalmology practice and researchArticle
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundTo calculate and evaluate the prevalence of reduced uncorrected distant visual acuity (UCDVA) in primary, middle and high schools in 6 districts of Changsha, Hunan, China.
methodsA population-based retrospective study was conducted in 239 schools in 6 districts of Changsha. After routine eye examination to rule out diseases that can affect refraction, 250,980 eligible students from primary, middle and high schools were enrolled in the survey. Then the uncorrected distant and near visual acuity of each eye were measured. Categories of schools, districts, grades, eye exercises and sports time were also documented and analyzed.
resultsThe overall prevalence of reduced UCDVA was 51.8% (95% confidence interval [CI]: 51.6-52.0%) in 6 districts of Changsha. Results of individual districts were as follows: Furong district 59.9%(95% CI: 57.9-61.8%), Tianxin district 62.3%(95% CI: 60.5-64.0%), Wangcheng district 47.8%(95% CI: 46.8-48.8%), Kaifu district 58.5%(95% CI: 58.0-58.9%), Yuhua district 47.0%(95% CI: 46.7-47.4%) and Yuelu district 52.6%(95% CI: 52.3-52.9%). The proportion of normal VA is seen to decrease from primary grade 3. The proportion of mildly reduced UCDVA is higher in primary grade 1 and 2. The proportion of moderately reduced UCDVA remains similar during 12 grades. The proportion of severely reduced UCDVA increases with grades. Multivariate analysis shows that the prevalence of reduced UCDVA is higher in key schools (risk ratio [RR] = 1.47, 95% CI 1.44-1.50) than non-key schools.
conclusionsAccording to the existing data analysis results, the prevalence of reduced UCDVA among primary, middle and high school students in Changsha is very high. Some effective measures need to be taken to prevent it.
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