Evidence map›Paper›PMID 32584907›Full record

Observational studyPloS one2020

Repeatability of measuring the vessel density in patients with retinal vein occlusion: An optical coherence tomography angiography study.

Kyeung-Min Kim, Min-Woo Lee, Hyung-Bin Lim, Hyung-Moon Koo, Yong-Il Shin, Jung-Yeul Kim

Abstract readObservational StudyValidation Study
In one paragraph

Observational study in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 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

8 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Observational
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  4. Article
  5. 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

6 authors.

Kyeung-Min KimDepartment of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea.
Min-Woo LeeDepartment of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea.
Hyung-Bin LimDepartment of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea.
Hyung-Moon KooDepartment of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea.
Yong-Il ShinDepartment of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea.
Jung-Yeul KimDepartment of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Republic of Korea.ORCID 0000-0003-3679-1310

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine the repeatability of superficial vessel density measurements using Spectral domain Ocular coherence tomography angiography(SD-OCTA) in patients diagnosed with retinal vein occlusion(RVO).

designProspective observational study. SUBJECTS: Patients who visited our retinal clinic from August 2017 to August 2018, diagnosed with RVO were recruited for the study.

methodsTwo consecutive 3×3 mm pattern scans were performed using the Cirrus HD-OCT 5000 along with AngioPlex software (Carl Zeiss Meditec) in each eye by single skilled examiner. All scans were analyzed using en face OCTA images to measure vessel density (VD) automatically. For further analysis of the effect of central macular thickness(CMT), eyes were divided into two groups according to CMT of 400μm (Group 1: CMT > 400μm, Group 2: CMT < 400μm). To identify factors affecting the repeatability of VD measurements, linear regression analyses were conducted for the coefficient of variation (CV) of VD by investigating demographics and ocular variables.

main outcome measuresThe intraclass correlation coefficient (ICC), coefficient of variation (CV) of VD measurements.

resultsA total of 57 eyes from 57 patients were examined: 35 eyes with BRVO and 22 eyes with CRVO. In all 57 eyes with RVO, the ICC and CV of the full VD(VD of 3mm diameter circle) were 0.800 and 10.61%, respectively. Univariate analyses showed that the mean CMT (B, 0.001; p<0.001) and mean ganglion cell-Inner plexiform layer (GC-IPL) thickness (B, -0.002; p = 0.020) were significant factors that affected the repeatability. Multivariate analyses of these two factors showed that only mean CMT was a significant factor. The ICC and CV of the full VD in group 1 (CMT > 400μm) were 0.348 and 22.55% respectively. In group 2 (CMT < 400μm), the ICC and CV of the full VD were 0.910 and 7.76%, respectively.

conclusionsThe repeatability of VD measurement in eyes with RVO was reasonably comparable to previous studies. Repeatability of VD measurement was significantly affected by central macular thickness.

Indexed as

AgedComputed Tomography AngiographyFemaleFluorescein AngiographyFovea CentralisFundus OculiHumansMaleMemory, EpisodicMiddle AgedProspective StudiesReproducibility of ResultsRetinal Vein OcclusionRetinal VesselsTomography, Optical Coherence

Identifiers

PMID32584907
PMCPMC7316309

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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.