Evidence map›Paper›PMID 26329826›Full record

Trial reportJapanese journal of ophthalmology2015

Prevalence of and factors associated with myopia in primary school students in the Chaoyang District of Beijing, China.

Yanyu Lyu, Hao Zhang, Yueqiu Gong, Dan Wang, Ting Chen, Xianghui Guo, Suhong Yang, Danyan Liu, Meixia Kang

Abstract readMulticenter StudyRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Japanese journal of ophthalmology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 3 pooled it
2.2field-weighted citation impact, top 13% 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, 3 syntheses or guidelines pooled it, 77 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

9 authors at 2 institutions in 1 country.

Yanyu LyuDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China.
Hao ZhangDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China.
Yueqiu GongDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China. gongyq518@126.com.
Dan WangDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China.
Ting ChenDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China.
Xianghui GuoChaoyang Center for Disease Control and Prevention, Beijing, China.
Suhong YangDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China.
Danyan LiuDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China.
Meixia KangDepartment of Ophthalmology, Capital Institute of Pediatrics, No.2 Yabao Street, 100020, Beijing, China.
Capital Institute of Pediatrics · CNBeijing Center for Disease Prevention and Control · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine the prevalence of and risk factors for myopia in primary school children in Chaoyang District, Beijing.

methodsThis cross-sectional prevalence survey was conducted in September to October 2011 in 4 schools randomly chosen from among the 126 primary schools in Chaoyang District. Students were assessed with autorefractometry under cycloplegia and checked with retinoscopy for accuracy. Questionnaires were completed by the students' parents.

resultsMyopia was present in 36.7 ± 0.7% of 4249 students aged 5-14 years old. The prevalence of myopia in girls (38.6 ± 1.1%) was significantly higher than in boys (35.0 ± 1.0 %) (p = 0.015) and increased with age (p < 0.001), with the highest prevalence observed in children aged ≥11 years (67.5 ± 1.8%). After adjustment, having a myopic parent (aOR 3.10; 95% CI 2.49-3.86), incorrect reading posture (aOR 2.09; 95% CI 1.75-2.50), reading a book at a distance of <20 cm (aOR 1.60; 95% CI 1.16-2.21), studying at home for >3 h daily (aOR 1.50; 95% CI 1.12-2.01), studying for >1 h continuously (aOR 1.21; 95% CI 1.02-1.45), and reading extracurricular books that utilize a font larger than that used in textbooks (aOR 0.74; 95% CI 0.59-0.94) were all significantly associated with myopia.

conclusionsThe prevalence of myopia among primary school children in Beijing increased with age, and was significantly higher in girls ≥10 years old. Myopia was significantly associated with parental myopia, reading posture, distance between the eyes and the book being read, font size used in extracurricular reading material, time spent studying at home, and the duration of continuous study time.

Indexed as

AdolescentAge DistributionAsian PeopleBeijingChildChild, PreschoolCross-Sectional StudiesFemaleHealth SurveysHumansMaleMyopiaPrevalenceRisk FactorsSchoolsSex DistributionChildrenChinaMyopiaRefractive errorRisk factors

Identifiers

PMID26329826
OpenAlexW1226138491

What OpenQuestion holds

Textmetadata
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.