Evidence map›Paper›PMID 29931571›Full record

Trial reportInternational ophthalmology2019

The effects of collagen cross-linking on corneal density: a comparison between accelerated and conventional methods.

Ali Mahdavi Fard, Rana Daei Sorkhabi, Mojtaba Khazaei, Nader D Nader

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in International ophthalmology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

7 citing papers in PubMed.

  1. Article
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  4. 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

4 authors.

Ali Mahdavi FardNikookari Hospital (Eye Center), Tabriz University of Medical Sciences, Tabriz, Iran.
Rana Daei SorkhabiNikookari Hospital (Eye Center), Tabriz University of Medical Sciences, Tabriz, Iran.
Mojtaba KhazaeiNikookari Hospital (Eye Center), Tabriz University of Medical Sciences, Tabriz, Iran.
Nader D NaderDepartment of Anesthesiology, State University of New York at Buffalo, 77 Goodell Street, Suite 550, Buffalo, NY, 14203, USA. nnader@buffalo.edu.ORCID http://orcid.org/0000-0002-5744-7319

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo compare the corneal density before and after accelerated versus conventional corneal cross-linking (CXL).

methodsPentacam densitometry and corneal mapping were performed before and 6 months following the randomly assigned intervention. Corneal density was measured over different zones and layers of the cornea by two independent ophthalmologists. Total corneal density was calculated. The patients were followed up for the occurrence of procedure-related and unrelated complication 1 week, 1 month and a final visit around 6 months (180 ± 10 days) after the procedure, during which the corneal density was remeasured and recorded.

resultsTwenty-three patients were enrolled. There was a significant increase in corneal density over the anterior layer (P < 0.001) and middle corneal layer (P = 0.035). Additionally, the corneal density significantly increased in 0-2 and 2-6 mm zones (P < 0.001), as well as total density (P = 0.002) following corneal CXL. Although there was no significant difference in the corneal density between the two CXL groups, the increase in corneal density was only significant in group A for the 6-10 mm zone and the posterior corneal layer.

conclusionBoth the conventional and accelerated CXL methods increase the overall corneal density with exception of posterior central corneal layer and the 6-10 mm zone, which is only increased in the accelerated method.

Indexed as

Visual AcuityAdultCell CountCollagenCorneal StromaCorneal TopographyCross-Linking ReagentsDensitometryFemaleFollow-Up StudiesHumansKeratoconusMalePhotochemotherapyPhotosensitizing AgentsRetrospective StudiesCollagenCross-Linking ReagentsPhotosensitizing AgentsRiboflavinCross-linkingDensitometryKeratoconus

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Registered trials

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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.