Evidence map›Paper›PMID 32472421›Full record

ArticleInternational ophthalmology2020

School-based epidemiology study of myopia in Tianjin, China.

Jiaxing Wang, Ying Li, Zhenyang Zhao, Nan Wei, Xiaoli Qi, Gang Ding, Xue Li, Jing Li, Linlin Song, Ying Zhang and 5 more

Open access · hybridAbstract read
In one paragraph

Article in International ophthalmology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
4.2field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 47 citations in OpenAlex.

  1. Incidence and Risk Factors of Refractive Error in Children in Spain: CISViT Project.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2026
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  14. Cutoff values of axial length/corneal radius ratio for determining myopia vary with age among 3-18 years old children and adolescents.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors at 5 institutions in 2 countries.

Jiaxing WangDepartment of Ophthalmology, Emory University, Atlanta, GA, USA.
Ying LiDepartment of Ophthalmology, Emory University, Atlanta, GA, USA.
Zhenyang ZhaoDepartment of Ophthalmology and Visual Sciences, University of Texas Medical Branch, Galveston, TX, USA.
Nan WeiDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Xiaoli QiDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Gang DingDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Xue LiDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Jing LiDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Linlin SongDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Ying ZhangDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Richard Hyun YiMedical College of Georgia, University of Georgia Health Sciences, Athens, GA, USA.
Yuxian NingDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Xiaoyu ZengDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Ning HuaDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China.
Xuehan QianDepartment of Strabismus and Pediatric Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin, 200284, China. qianxuehan@yahoo.com.
Tianjin Medical University Eye Hospital · CNTianjin Medical University · CNEmory University · USThe University of Texas Medical Branch at Galveston · USUniversity of Georgia · US

Funding

Natural Science Foundation of Tianjin Municipal Science and Technology Commission 17ZXHLSY00020Tianjin Medical University Eye Hospital High-level Innovative Talent Program for Distinguished Scholar YDYYRCXM-B2018-02LC
6 · The paper itself

Abstract

purposeTo study the epidemiology of myopia in school-aged children in Tianjin and the relationship between visual acuity-based screening and refraction-based screening.

methodThis school-based prospective cohort study was performed on children from 42 elementary schools and 17 middle schools in Tianjin, China. Totally 14,551 children, ages ranging from 5 to 16 years, were included in this study. Uncorrected visual acuity (UCVA) was determined by logarithmic tumbling E chart. Non-cycloplegic photorefraction was examined by the Spot (v2.1.4) photoscreener. The relationship between the UCVA and refractive error was investigated for different age groups.

resultsThe overall prevalence of myopia at this school based screen is 78.2%, ranged from 10% at age of 5 to 95% at age of 16. The most dramatic increase in prevalence is from age of 6 (14.8%) to age of 7 (38.5%). The overall prevalence of high myopia is 2.5%. UCVA is found corresponding to spherical equivalent refraction (SER) in a manner of normal distribution and is significantly affected by age. When using UCVA to estimate the prevalence of myopia, the overall sensitivity and specificity are 0.824 and 0.820, respectively. Age-dependent optimal cutoff points and 95% confident intervals of such estimation are reported.

conclusionsMyopia is heavily affecting school-aged children in Tianjin, China. The refraction screening is preferable for myopia screening, whereas the UCVA screening results need to be interpreted in an age-dependent manner for myopia estimation.

Indexed as

MyopiaRefractive ErrorsAdolescentChildChild, PreschoolChinaHumansPrevalenceProspective StudiesRefraction, OcularSchoolsChildrenEpidemiologyMyopiaPhotoscreenRefractive errorVisual acuity

Identifiers

PMID32472421
PMCPMC7481173
OpenAlexW3031550556

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.