Evidence map›Paper›PMID 32043518›Full record

Observational studyThe journals of gerontology. Series A, Biological sciences and medical sciences2020

Higher Dementia Incidence in Older Adults with Poor Visual Acuity.

Allen T C Lee, Marcus Richards, Wai C Chan, Helen F K Chiu, Ruby S Y Lee, Linda C W Lam

Open access · hybridAbstract readObservational Study
In one paragraph

Observational study in The journals of gerontology. Series A, Biological sciences and medical sciences, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 5 pooled it
6.0field-weighted citation impact, top 3% 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

47 citing papers in PubMed, 5 syntheses or guidelines pooled it, 70 citations in OpenAlex.

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  6. Review
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  9. [Vision loss, cognitive decline and dementia-A narrative review article].Zeitschrift fur Gerontologie und Geriatrie · 2025
    Review
  10. Article
  11. Sensory impairment and dementia risk among older adults in rural South Africa.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  12. Article
  13. Early detection of Alzheimer's disease using the MEMORIES mnemonic.Chronic diseases and translational medicine · 2025
    Review
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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

6 authors at 4 institutions in 3 countries.

Allen T C LeeDepartment of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China.
Marcus RichardsMRC Unit for Lifelong Health and Ageing at UCL, London, UK.
Wai C ChanDepartment of Psychiatry, The University of Hong Kong, Hong Kong SAR, China.
Helen F K ChiuDepartment of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China.
Ruby S Y LeeElderly Health Service, Department of Health, The Government of Hong Kong SAR, China.
Linda C W LamDepartment of Psychiatry, The Chinese University of Hong Kong, Hong Kong SAR, China.
Chinese University of Hong Kong · CNDepartment of Health · CNUniversity College London · GBUniversity of Hong Kong · HK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLongitudinal evidence of poor visual acuity associating with higher risk of incident dementia is mixed. This study aimed to examine if poor visual acuity was associated with higher dementia incidence in a large community cohort of older adults, independent of the possible biases relating to misclassification error, reverse causality, and confounding effects due to health problems and behaviors.

methodsA total of 15,576 community-living older adults without dementia at baseline were followed for 6 years to the outcome of incident dementia, which was diagnosed according to the ICD-10 or a Clinical Dementia Rating of 1 to 3. Visual acuity was assessed using the Snellen's chart at baseline and follow-up. Important variables including demographics (age, sex, education, and socioeconomic status), physical and psychiatric comorbidities (cardiovascular risks, ophthalmological conditions, hearing impairment, poor mobility, and depression), and lifestyle behaviors (smoking, diet, physical, intellectual, and social activities) were also assessed.

resultsOver 68,904 person-years of follow-up, 1,349 participants developed dementia. Poorer visual acuity at baseline was associated with higher dementia incidence in 6 years, even after adjusting for demographics, health problems, and lifestyle behaviors, and excluding those who developed dementia within 3 years after baseline. Compared with normal vision, the hazard ratio of dementia was 1.19 (p = .31), 2.09 (p < .001), and 8.66 (p < .001) for mild, moderate, and severe visual impairment, respectively.

conclusionsModerate-to-severe visual impairment could be a potential predictor and possibly a risk factor for dementia. From a clinical perspective, older adults with poor visual acuity might warrant further risk assessment for dementia.

Indexed as

AgedDementiaFemaleHong KongHumansIncidenceIndependent LivingLongitudinal StudiesMaleRisk AssessmentVision DisordersVisual AcuityCognitive impairmentPoor visionVisual impairment

Identifiers

PMID32043518
PMCPMC7566398
OpenAlexW3005739201

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.