Evidence map›Paper›PMID 31506524›Full record

ArticleScientific reports2019

Spatial analysis of thickness changes in ten retinal layers of Alzheimer's disease patients based on optical coherence tomography.

Luis Jáñez-Escalada, Lucía Jáñez-García, Elena Salobrar-García, Alejandro Santos-Mayo, Rosa de Hoz, Raquel Yubero, Pedro Gil, José M Ramírez

Abstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 2 pooled it
–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

34 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Brain and retina in Alzheimer's disease: Pathological intersections and estimates from imaging.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Age-Related Retinal Layer Thickness Changes Measured by OCT inInternational journal of molecular sciences · 2024
    Article
  11. Alzheimer's disease pathophysiology in the Retina.Progress in retinal and eye research · 2024
    Review
  12. Choriocapillaris reduction accurately discriminates against early-onset Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    Article
  13. Review
  14. Non-invasiveFrontiers in cellular neuroscience · 2024
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. 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

8 authors.

Luis Jáñez-EscaladaInstituto de Tecnología del Conocimiento, Universidad Complutense de Madrid, Madrid, Spain. escalada@ucm.es.ORCID http://orcid.org/0000-0002-0442-1270
Lucía Jáñez-GarcíaInstituto de Investigaciones Oftalmológicas Ramón Castroviejo, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.ORCID http://orcid.org/0000-0003-2319-973X
Elena Salobrar-GarcíaInstituto de Investigaciones Oftalmológicas Ramón Castroviejo, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.
Alejandro Santos-MayoInstituto de Tecnología del Conocimiento, Universidad Complutense de Madrid, Madrid, Spain.
Rosa de HozInstituto de Investigaciones Oftalmológicas Ramón Castroviejo, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain.
Raquel YuberoUnidad de Memoria, Servicio de Geriatría, Hospital Clínico San Carlos, Madrid, Spain.
Pedro GilUnidad de Memoria, Servicio de Geriatría, Hospital Clínico San Carlos, Madrid, Spain.
José M RamírezInstituto de Investigaciones Oftalmológicas Ramón Castroviejo, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain. ramirezs@med.ucm.es.ORCID http://orcid.org/0000-0002-5145-5094

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The retina is an attractive source of biomarkers since it shares many features with the brain. Thickness differences in 10 retinal layers between 19 patients with mild Alzheimer's disease (AD) and a control group of 24 volunteers were investigated. Retinal layers were automatically segmented and their thickness at each scanned point was measured, corrected for tilt and spatially normalized. When the mean thickness of entire layers was compared between patients and controls, only the outer segment layer of patients showed statistically significant thinning. However, when the layers were compared point-by point, patients showed statistically significant thinning in irregular regions of total retina and nerve fiber, ganglion cell, inner plexiform, inner nuclear and outer segment layers. Our method, based on random field theory, provides a precise delimitation of regions where total retina and each of its layers show a statistically significant thinning in AD patients. All layers, except inner nuclear and outer segments, showed thickened regions. New analytic methods have shown that thinned regions are interspersed with thickened ones in all layers, except inner nuclear and outer segments. Across different layers we found a statistically significant trend of the thinned regions to overlap and of the thickened ones to avoid overlapping.

Indexed as

AgedAlzheimer DiseaseCase-Control StudiesCross-Sectional StudiesFemaleHumansMaleNerve FibersRetinaRetinal DiseasesSpatial AnalysisTomography, Optical Coherence

Identifiers

PMID31506524
PMCPMC6737098

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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.