Evidence map›Paper›PMID 36585663›Full record

ArticleBMC ophthalmology2022

Prevalence of myopia and associated risk factors among key schools in Xi'an, China.

Xingxing Zhao, Xin Lu, Lu Yu, Yiping Zhang, Jian Li, Yingyao Liu, Geqiang Yang, Yuan Wang, Wen Zhang, Zhaojiang Du

Open access · goldAbstract read
In one paragraph

Article in BMC ophthalmology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 2 pooled it
3.7field-weighted citation impact, top 6% 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

21 citing papers in PubMed, 2 syntheses or guidelines pooled it, 24 citations in OpenAlex.

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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

10 authors at 2 institutions in 1 country.

Xingxing ZhaoDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Xin LuDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Lu YuDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Yiping ZhangDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Jian LiDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Yingyao LiuDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Geqiang YangDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Yuan WangDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Wen ZhangDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China.
Zhaojiang DuDepartment of Ophthalmology, Xi'an Central Hospital 710005, Shaanxi Province, China. tomdzj@163.com.
Xian Central Hospital · CNYan'an University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe aim of this study is to investigate the prevalence of myopia and high myopia and the associated risk factors in key schools in Xi'an, China.

methodsThis cross-sectional study started in September 2021 and was conducted for one month. A total of 11,011 students from 10 key primary schools, five key junior high schools and five key high schools in Xi'an were randomly selected to undergo visual acuity measurement and non-cycloplegic autorefraction. The questionnaire was completed by the students and their parents together.

resultsThe prevalence of myopia and high myopia in key schools were 75.7% and 9.7%, respectively. The prevalence of myopia and high myopia rose significantly as grade or age increased (all P < 0.001), and the prevalence of myopia and high myopia in females was higher than that in males (P < 0.001, P < 0.5). According to the multivariable logistic regression analysis, older age (OR=1.42), female compared with male (OR=1.43), having one myopic parent (OR=1.64), having two myopic parent (OR=2.30) and often taking extracurricular tuition (OR=1.35) were more likely to be associated with develop myopia (P < 0.001). Older age (OR=1.39), having one myopic parent (OR=2.29), having two myopic parent (OR= 3.69), and often taking extracurricular tuition (OR=1.48) were more likely to be associated with high myopia (P < 0.001).

conclusionsThe overall rate of myopia and high myopia in key schools in Xi'an, China, is extremely high. Myopia and high myopia are associated with increasing age, parents' myopia, few outdoor exercises, and extracurricular tuition. Myopia is also associated with female and not having the habit of "one punch, one foot, one inch (when reading and writing, 10 cm from the chest to the table, 33 cm from the eye to the book and 3.3 cm from the tip of the pen to the finger)".

Indexed as

MyopiaChinaCross-Sectional StudiesFemaleHumansMalePrevalenceRefraction, OcularRisk FactorsSchoolsSurveys and QuestionnairesChildrenChinaHigh myopiaMyopiaPrevalenceRisk factors

Identifiers

PMID36585663
PMCPMC9801531
OpenAlexW4313455290

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.