Evidence map›Paper›PMID 37344116›Full record

ArticleBMJ open2023

Patterns and determinants of incident cataract surgery in China from 2011 to 2015 using a nationally representative longitudinal database.

Catherine Jan, Jin Xin, Yanhui Dong, Thomas Butt, Robert Chang, Lisa Keay, Mingguang He, David Friedman, Nathan Congdon

Abstract read
In one paragraph

Article in BMJ open, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
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

3 citing papers in PubMed.

  1. 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

9 authors.

Catherine JanDepartment of Ophthalmology and Surgery, Faculty of Medicine, Dentistry & Health Sciences, The University of Melbourne, East Melbourne, Victoria, Australia jlingxue@gmail.com n.congdon@qub.ac.uk.ORCID 0000-0001-7383-8208
Jin XinInstitute of Population Research, Peking University, Beijing, People's Republic of China.ORCID 0000-0001-8712-4513
Yanhui DongInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, People's Republic of China.
Thomas ButtUCL Institute of Ophthalmology, University College London, London, UK.
Robert ChangByers Eye Institution, Stanford University, Palo Alto, California, USA.
Lisa KeaySchool of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia.
Mingguang HeCentre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Melbourne, Australia.
David FriedmanDepartment of Ophthalmology, Harvard University, Boston, Massachusetts, USA.
Nathan CongdonZhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China jlingxue@gmail.com n.congdon@qub.ac.uk.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo investigate incident cataract surgery and to investigate determinants of cataract surgery uptake in Chinese adults.

designThis nationally representative longitudinal study recorded self-reported incident cataract surgery, and measured biological, clinical and socioeconomical characteristics at baseline and endline.

settingIn the first stage, 150 county-level units were randomly chosen with a probability-proportional-to-size sampling technique from a sampling frame containing all county-level units. The sample was stratified by region and within region by urban district or rural county and per capita gross domestic product. The final sample of 150 counties fell within 28 provinces of China.

participantsUrban and rural Chinese persons aged 45 years and older. PRIMARY AND SECONDARY OUTCOME MEASURES: Incident cataract surgery (primary outcome) and the factors associated with incident cataract surgery (secondary outcome).

resultsAmong 16 663 people enrolled in 2011, 13 705 (82.2%) attended follow-up in 2015. Among these, 167 (1.22%) reported incident cataract surgery. Those receiving surgery were significantly older (66.2±8.79 vs 58.3±9.18, p≤0.001) and more likely to report: illiteracy (44.9% vs 27.1%, p<0.001), poor baseline distance vision (49.7% vs 20.0%, p≤0.001), poor baseline near vision (37.1% vs 21.8%, p≤0.001), baseline visual impairment (15.6% vs 5.5%, p≤0.001), diabetes (12.0% vs 7.42%, p≤0.05) and higher baseline depression scores (9.7 vs 8.4 on a scale of 0-30, p≤0.05). In linear regression models, older age, worse distance vision, hypertension or diabetes, illiteracy and lower depression score were significantly associated with undergoing surgery. Results were similar in models including only persons aged ≥60 years, except that urban residence was also associated with surgery. When only those aged ≥60 years with poor vision were included, results were again the same, except that higher household expenditure was also associated with surgery.

conclusionsIn China, cataract surgical rates remain low; underserved groups such as rural dwellers are less likely to receive cataract surgery.

Indexed as

CataractCataract ExtractionVision, LowChinaHumansLongitudinal StudiesVisual Acuitycataract and refractive surgeryepidemiologyophthalmology

Identifiers

PMID37344116
PMCPMC10314420

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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.