Trial reportPloS one2019
Population prevalence of myopia, glasses wear and free glasses acceptance among minority versus Han schoolchildren in China.
Trial report in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.
What it found
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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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
8 citing papers in PubMed, 2 syntheses or guidelines pooled it, 13 citations in OpenAlex.
- Estimating need and coverage for five priority assistive products: a systematic review of global population-based research.BMJ global health · 2022Pooled it
- Prevalence and time trends of refractive error in Chinese children: A systematic review and meta-analysis.Journal of global health · 2021Pooled it
- Comparison of spherical equivalent and estimated prevalence of myopia in school-age children between Shanghai and Yunnan in China.Frontiers in medicine · 2025Article
- Large-scale study in Chengdu, China: The prevalence of myopia full-correction decreased with increasing myopia in adolescents.Heliyon · 2024Article
- Myopia prevalence and ocular biometry: a cross-sectional study among minority versus Han schoolchildren in Xinjiang Uygur autonomous region, China.Eye (London, England) · 2022Article
- Prevalence of myopia in 3-14-year-old Chinese children: a school-based cross-sectional study in Chengdu.BMC ophthalmology · 2021Article
- Prevalence of Refractive Error and Visual Acuity Among School Children in the Plateau Region of Qinghai, China.International journal of general medicine · 2021Article
- The prevalence and correlates of vision impairment and glasses ownership among ethnic minority and Han schoolchildren in rural China.PloS one · 2021Article
Corrections and comments
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Authors and funding
12 authors at 7 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimTo measure myopia, glasses wear and free glasses acceptance among minority and Han children in China.
methodsVisual acuity testing and questionnaires assessing ethnicity, study time, and parental and teacher factors were administered to a population-based sample of 9-12 year old minority and Han children in Yunnan and Guangdong, and their teachers and parents. Refraction was performed on children with uncorrected visual acuity (VA) < = 6/12 in either eye, and acceptance of free glasses assessed.
main outcome measuresBaseline myopia (uncorrected visual acuity < = 6/12 in > = 1 eye and spherical equivalent refractive power < = -0.5D in both eyes); baseline glasses wear; free glasses acceptance.
resultsAmong 10,037 children (mean age 10.6 years, 52.3% boys), 800 (8.0%) were myopic, 4.04% among Yunnan Minority children (OR 0.47, 95%CI 0.33, 0.67, P<0.001), 6.48% in Yunnan Han (OR 0.65, 95%CI 0.45, 0.93, P = 0.019), 9.87% in Guangdong Han (Reference). Differences remained significant after adjusting for study time and parental glasses wear. Difference in baseline glasses ownership (Yunnan Minority 4.95%, Yunnan Han 6.15%, Guangdong Han 15.3%) was not significant after adjustment for VA. Yunnan minority children (71.0%) were more likely than Yunnan Han (59.6%) or Guangdong Han (36.8%) to accept free glasses. The difference was significant after adjustment only compared to Guangdong Han (OR 3.34, 95% CI 1.62, 6.90, P = 0.001).
conclusionMyopia is more common among Han children and in wealthier Guangdong. Baseline differences in glasses wear could be explained by student, teacher and parental factors. Yunnan Minority children were more likely to accept free glasses.
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