Evidence map›Paper›PMID 20079923›Full record

ArticleOphthalmology2010

Prevalence of vision impairment in older adults in rural China: the China Nine-Province Survey.

Jialiang Zhao, Leon B Ellwein, Hao Cui, Jian Ge, Huaijin Guan, Jianhua Lv, Xianzhi Ma, Jinglin Yin, Zheng Qin Yin, Yuansheng Yuan and 1 more

Abstract readMulticenter Study
In one paragraph

Article in Ophthalmology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 4 pooled it
5.7field-weighted citation impact, top 4% 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

68 citing papers in PubMed, 4 syntheses or guidelines pooled it, 129 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Article
  6. Article
  7. Article
  8. Article
  9. Observational
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Loneliness and Social Support among the Middle-Aged and Elderly People with Visual Impairment.International journal of environmental research and public health · 2022
    Article
  19. Review
  20. Article

8 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 9 institutions in 2 countries.

Jialiang ZhaoChinese Academy of Medical Sciences, Peking Union Medical College Hospital, Beijing, China. zhaojialiang@medmail.com.cn
Leon B Ellwein
Hao Cui
Jian Ge
Huaijin Guan
Jianhua Lv
Xianzhi Ma
Jinglin Yin
Zheng Qin Yin
Yuansheng Yuan
Hu Liu
Chinese Academy of Medical Sciences & Peking Union Medical College · CNAffiliated Hospital of Nantong University · CNArmy Medical University · CNHarbin Medical University · CNHebei Eye Hospital · CNJiangxi Provincial People's Hospital · CNNational Eye Institute · USSecond Affiliated Hospital of Kunming Medical College · CNSun Yat-sen University · CN

Funding

Intramural NIH HHS Z99 EY999999NEI NIH HHS N01-EY-2103
6 · The paper itself

Abstract

purposeDescribe the prevalence of visual impairment/blindness among older adults in rural populations in China.

designPopulation-based, cross-sectional study.

participantsWe evaluated 45 747 adults > or =50 years of age.

methodsGeographically defined cluster sampling was used in randomly selecting a cross-section of residents from a representative rural county within each of 9 provinces in mainland China. Participants were enumerated through village registers followed by door-to-door household visits. Eligible persons were invited to local examination sites for visual acuity (VA) testing and eye examination.

main outcome measuresPresenting and best-corrected distance VA.

resultsOf 50 395 enumerated eligible persons, 45 747 (90.8%) were examined and tested for VA. The prevalence of presenting visual impairment <20/63 to > or =20/400 in the better eye was 10.8% and blindness (<20/400) was 2.29%. Across the 9 provinces, presenting visual impairment ranged from 6.89% to 15.8%, and blindness from 1.27% to 5.40%. With best-corrected VA, the prevalence of visual impairment was 5.30%, and 1.93% for blindness. The ranges across the 9 provinces were 3.13% to 9.51% for visual impairment and 0.74% to 4.95% for blindness. Visual impairment and blindness were associated with older age, female gender, lack of education, and geographic area (province) with both presenting and best-corrected VA.

conclusionsVisual impairment and blindness are important public health problems in rural China, with significant regional variations in prevalence. Blindness prevention programs targeting the rural elderly should be expanded, particularly in areas with limited access and affordability of eye care services. Special emphasis should be given to reaching women and those without education. Greater attention should also be given to correction of refractive error.

Indexed as

AgedAged, 80 and overAge DistributionBlindnessChinaCross-Sectional StudiesEducational StatusFemaleHealth Services ResearchHealth SurveysHumansMaleMiddle AgedPersons with Visual DisabilitiesPrevalenceRural Population

Identifiers

PMID20079923
PMCPMC6029941
OpenAlexW2198010619

What OpenQuestion holds

Textmetadata
LicenceTDM
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.