Characterizing Core Journals in Ophthalmology Literature Using Bradford's Law: A Bibliometric Analysis.

Leo Meller, Vasan Jagadeesh, Michael Oca, Katherine Wilson, Jeffrey Lee, Sally Baxter, Nathan Scott

Abstract read

In one paragraph

Article in Journal of academic ophthalmology (2017), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing 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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

7 authors.

Leo MellerSchool of Medicine, University of California San Diego, La Jolla, CA, USA.

Vasan JagadeeshSchool of Medicine, University of California San Diego, La Jolla, CA, USA.

Michael OcaSchool of Medicine, University of California San Diego, La Jolla, CA, USA.

Katherine WilsonSchool of Medicine, University of California San Diego, La Jolla, CA, USA.

Jeffrey LeeViterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA.

Sally BaxterViterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA.

Nathan ScottViterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA.

Funding

Short-Term Research training In Vision and Eye health (STRIVE)T35EY033704 · NEI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI Jolene Rudell, LINDA M ZANGWILL · 2022 to 2026

$144k

NEI NIH HHS T35 EY033704

6 · The paper itself

Abstract

Purpose: The exponential growth of ophthalmology research can be challenging to keep up with for trainees, researchers and clinicians and little has been done to identify core ophthalmology journals. We thus applied Bradford's law to characterize core journals in ophthalmology. Design: Cross-sectional bibliometric analysis. Methods: Two sets of top 10 National Library of Medicine indexed ophthalmology journals based on h-index and impact factor (IF) were combined to create top 14 journals used for analysis. The references from all articles published in these journals in one randomized quarter were compiled into a citation database. Bradford's law was applied to identify zonal distribution of journals. Results: A total of 3093 journals containing 34,633 articles were cited in ophthalmology literature from July-Sept 2022. Under linear regression, IF was significantly associated with h-index for the top 20 journals (P < 0.001) and top 10 ophthalmology journals (P = 0.017). H-index was significantly associated with number of citations for top 10 ophthalmology journals (P < 0.001). Three zones obeying Bradford's law were identified, with zone 1 (core) containing six journals and 8410 citations, zone 2 containing 27 journals and 8359 citations, zone 3 containing 154 journals and 8419 citations. A linear relationship between the log journal rank for zones 1-3 and cumulative number of citations was found (R Conclusions: Six core ophthalmology journals were identified:

Indexed as

Bibliometric analysisBradford’s lawCore journalsMedical educationOphthalmology

Identifiers

PMID42602743

DOI10.62199/2475-4757.1038

PMCPMC13475947

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.