Evidence map›Paper›PMID 24467558›Full record

ArticleOphthalmic epidemiology2014

Harmonizing the classification of age-related macular degeneration in the three-continent AMD consortium.

Ronald Klein, Stacy M Meuer, Chelsea E Myers, Gabriëlle H S Buitendijk, Elena Rochtchina, Farzana Choudhury, Paulus T V M de Jong, Roberta McKean-Cowdin, Sudha K Iyengar, Xiaoyi Gao and 6 more

Erratum issuedOpen access · greenAbstract read
In one paragraph

Article in Ophthalmic epidemiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 62 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed, 3 pooled it
6.0field-weighted citation impact, top 4% 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

62 citing papers in PubMed, 3 syntheses or guidelines pooled it, 107 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Article
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  7. Article
  8. Review
  9. Central retinal volume derived from optical coherence tomography as a potential predictor of mortality in the old-aged population- results from the German AugUR study.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Article
  10. Observational
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  14. Extracting full information from OCT scans-signs of early age-related macular degeneration within inner retinal layers by local neighbourhood statistics. Part I: Methodology.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025
    Article
  15. Review
  16. Extracting full information from OCT scans-signs of early age-related macular degeneration within inner retinal layers by local neighbourhood statistics. Part II: Results.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025
    Article
  17. RPE Curvature Can Screen for Early and Intermediate AMD.Investigative ophthalmology & visual science · 2024
    Article
  18. Article
  19. Article
  20. Article

2 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

16 authors at 7 institutions in 4 countries.

Ronald KleinDepartment of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health , Madison, Wisconsin , USA .
Stacy M Meuer
Chelsea E Myers
Gabriëlle H S Buitendijk
Elena Rochtchina
Farzana Choudhury
Paulus T V M de Jong
Roberta McKean-Cowdin
Sudha K Iyengar
Xiaoyi Gao
Kristine E Lee
Johannes R Vingerling
Paul Mitchell
Caroline C W Klaver
Jie Jin Wang
Barbara E K Klein
University of Southern California · USErasmus MC · NLMillennium Institute · BRCase Western Reserve University · USCentre for Eye Research Australia · AUErasmus University Rotterdam · NLRoyal Netherlands Academy of Arts and Sciences · NL

Funding

LOS ANGELES LATINO EYE STUDYU10EY011753 · NEI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI VARMA, ROHIT · 1998 to 2014
$35.6M
THE EPIDEMIOLOGY OF AGE-RELATED OCULAR DISEASEU10EY006594 · NEI · UNIVERSITY OF WISCONSIN-MADISON · PI KLEIN, RONALD · 1987 to 2018
$17.3M
VISION RESEARCHP30EY003040 · NEI · DOHENY EYE INSTITUTE · PI SUN, DEMING · 1985 to 2013
$7.0M
NEI NIH HHS EY03040NEI NIH HHS EY06594NEI NIH HHS EY11753NEI NIH HHS P30 EY003040NEI NIH HHS U10 EY006594NEI NIH HHS U10 EY011753
6 · The paper itself

Abstract

purposeTo describe methods to harmonize the classification of age-related macular degeneration (AMD) phenotypes across four population-based cohort studies: the Beaver Dam Eye Study (BDES), the Blue Mountains Eye Study (BMES), the Los Angeles Latino Eye Study (LALES), and the Rotterdam Study (RS).

methodsAMD grading protocols, definitions of categories, and grading forms from each study were compared to determine whether there were systematic differences in AMD severity definitions and lesion categorization among the three grading centers. Each center graded the same set of 60 images using their respective systems to determine presence and severity of AMD lesions. A common 5-step AMD severity scale and definitions of lesion measurement cutpoints and early and late AMD were developed from this exercise.

resultsApplying this severity scale changed the age-sex adjusted prevalence of early AMD from 18.7% to 20.3% in BDES, from 4.7% to 14.4% in BMES, from 14.1% to 15.8% in LALES, and from 7.5% to 17.1% in RS. Age-sex adjusted prevalences of late AMD remained unchanged. Comparison of each center's grades of the 60 images converted to the consortium scale showed that exact agreement of AMD severity among centers varied from 61.0-81.4%, and one-step agreement varied from 84.7-98.3%.

conclusionHarmonization of AMD classification reduced categorical differences in phenotypic definitions across the studies, resulted in a new 5-step AMD severity scale, and enhanced similarity of AMD prevalence among the four cohorts. Despite harmonization it may still be difficult to remove systematic differences in grading, if present.

Indexed as

AgedAged, 80 and overAustraliaCohort StudiesFemaleHumansMacular DegenerationMaleMiddle AgedNetherlandsPrevalenceSeverity of Illness IndexUnited States

Identifiers

PMID24467558
PMCPMC4029416
OpenAlexW2161143583

What OpenQuestion holds

Textmetadata
LicenceTDM
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.