Evidence map›Paper›PMID 35459156›Full record

SynthesisBMC public health2022

Screen time and health issues in Chinese school-aged children and adolescents: a systematic review and meta-analysis.

Youjie Zhang, Shun Tian, Dan Zou, Hengyan Zhang, Chen-Wei Pan

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC public health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 1 pooled it
29.1field-weighted citation impact, top 1% 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

34 citing papers in PubMed, 1 synthesis or guideline pooled it, 53 citations in OpenAlex.

  1. Pooled it
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  12. Observational
  13. Objective Assessment of Media Screens Effect on Physical Activity in Preschool Children.IEEE access : practical innovations, open solutions · 2026
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  18. IMI-2025 Digest.Investigative ophthalmology & visual science · 2025
    Article
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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

5 authors at 1 institution in 1 country.

Youjie ZhangSchool of Public Health, Medical College of Soochow University, 199 Ren Ai Road, 215123, Suzhou, Jiangsu, China. ujzhang@suda.edu.cn.
Shun TianSchool of Public Health, Medical College of Soochow University, 199 Ren Ai Road, 215123, Suzhou, Jiangsu, China.
Dan ZouSchool of Public Health, Medical College of Soochow University, 199 Ren Ai Road, 215123, Suzhou, Jiangsu, China.
Hengyan ZhangSchool of Public Health, Medical College of Soochow University, 199 Ren Ai Road, 215123, Suzhou, Jiangsu, China.
Chen-Wei PanSchool of Public Health, Medical College of Soochow University, 199 Ren Ai Road, 215123, Suzhou, Jiangsu, China. pcwonly@gmail.com.
Soochow University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundsMany literature reviews summarized relationships between screen time and child health, but they only included a few studies conducted in Chinese children and adolescents. The potential influence of screen time may vary by social context. The current systematic review and meta-analysis aimed to evaluate relationships between screen time and health issues among Chinese school-aged children and adolescents.

methodsPeer-reviewed articles written in Chinese and English were retrieved from CNKI, Wanfang, PubMed, Embase, and Web of Science from inception to June 2020. The Downs & Black checklist was applied to assess study quality. Meta analyses used random effect models and mixed effects model to calculate pooled adjusted odds ratios and 95% confidence intervals. Heterogeneity, sensitivity, and publication bias were assessed using Q and I

resultsIn total, we identified 252 articles reporting 268 studies with unique samples. These studies investigated relationships between screen time and health issues of adiposity, myopia, psycho-behavioral problems, poor academic performance, cardiometabolic disease risks, sleep disorder, poor physical fitness, musculoskeletal injury, sub-health, and miscellaneous issues of height and pubertal growth, injury, sick leave, and respiratory symptoms. Proportions of studies reporting positive relationships with screen time were lowest in adiposity (50.6%) and higher in myopia (59.2%) and psycho-behavioral problems (81.8%). Other health issues were examined in 10 or less studies, all of which had more than half showing positive relationships. The pooled odds ratio from 19 studies comparing health risks with the screen time cutoff of 2 hours per day was 1.40 (95% CI: 1.31 to 1.50, I

conclusionsFindings exclusively generated from Chinese school-aged children and adolescents resonate those mainly from western countries. Evidence suggests that higher levels of screen time are related with greater risks of various health issues, although the relationships appear to be weak and intertwined with other confounding factors. Future studies need to investigate health-specific dose effects and mechanisms of screen time.

Indexed as

MyopiaScreen TimeAdolescentChildChinaHumansPhysical FitnessAdolescentChildChild healthChineseScreen time

Identifiers

PMID35459156
PMCPMC9034635
OpenAlexW4224216625

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.