Evidence map›Paper›PMID 34032979›Full record

ArticleInternational ophthalmology2021

Risk factors for progression following corneal collagen crosslinking in keratoconus.

Ayhan Sağlık, Gökçen Özcan, Ömür Uçakhan

Abstract read
PubMed Publisher
In one paragraph

Article in International ophthalmology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.1field-weighted citation impact, top 23% 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

11 citing papers in PubMed, 16 citations in OpenAlex.

  1. Article
  2. Observational
  3. Machine learning-based progress prediction in accelerated cross-linking for Keratoconus.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Systemic Associations with Keratoconus.Life (Basel, Switzerland) · 2023
    Review
  10. Article
  11. Article
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

3 authors at 2 institutions in 1 country.

Ayhan SağlıkDepartment of Ophthalmology, Faculty of Medicine, Harran University, Şanlıurfa, Turkey. saglikayhan@yahoo.com.ORCID http://orcid.org/0000-0003-1010-1289
Gökçen ÖzcanDepartment of Ophthalmology, Faculty of Medicine, Ankara University, Ankara, Turkey.
Ömür UçakhanDepartment of Ophthalmology, Faculty of Medicine, Ankara University, Ankara, Turkey.
Ankara University · TRHarran University · TR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo assess risk factors for progression following corneal collagen crosslinking (CXL) in eyes with keratoconus.

methodsCharts of patients who developed progression following conventional CXL treatment (Dresden protocol) were retrospectively evaluated in two centers (Center 1 and Center 2). 871 eyes of a total of 676 patients were analyzed. Progression was defined as > 1 diopter (D) increase in maximum keratometry (Kmax) readings compared to baseline.

resultsProgression was noted in 20 eyes of 20 patients (progression rate 3%). The mean age of the patients was 17.65 ± 5.76 (11-34)-years-old, and the mean follow-up following CXL was 36.70 ± 25.72 (12-84)-months-old. The gender distribution was 13 (65%) females and seven (35%) males. Four eyes (20%) had mild, 13 eyes (65%) had moderate, and three eyes (15%) had severe keratoconus at baseline. Fifteen eyes (75%) had allergic conjunctivitis, and 20 eyes (100%) reported eye-rubbing. Cone location was central in 17 (85%) eyes, and peripheral in 3 (15%) eyes. A mean of 2.21 ± 1.30 D (1.00-5.30 D) steepening was determined at Kmax 6 to 82 months following CXL treatment.

conclusionsProgression rate was found to be higher in the patients under the age of 17 years, female gender, allergic conjunctivitis, high preoperative Kmax (> 57 D), thin corneas (< 430 µm). The majority of progressive patients were central cone and moderate keratoconus.

Indexed as

KeratoconusPhotochemotherapyAdolescentAdultChildChild, PreschoolCollagenCorneal PachymetryCorneal TopographyCross-Linking ReagentsFemaleHumansMalePhotosensitizing AgentsRetrospective StudiesRiboflavinCollagenCross-Linking ReagentsPhotosensitizing AgentsRiboflavinCorneaCorneal topographyCrosslinkingKeratoconusProgression

Identifiers

PMID34032979
OpenAlexW3135872936

What OpenQuestion holds

Textmetadata
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.