Evidence map›Paper›PMID 33607930›Full record

ArticleEuropean journal of ophthalmology2022

Association of metformin and development of dry age-related macular degeneration in a U.S. insurance claims database.

Emily A Eton, Thomas J Wubben, Cagri G Besirli, Peiying Hua, Brendan McGeehan, Brian L VanderBeek

Open access · greenAbstract read
In one paragraph

Article in European journal of ophthalmology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
3.7field-weighted citation impact, top 6% 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Review
  5. Article
  6. Different Therapeutic Approaches for Dry and Wet AMD.International journal of molecular sciences · 2024
    Review
  7. Review
  8. Article
  9. Article
  10. Review
  11. Article
  12. Repurposing Drugs for Treatment of Age-Related Macular Degeneration.Advances in experimental medicine and biology · 2023
    Article
  13. Article
  14. Review
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  16. 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

6 authors at 3 institutions in 1 country.

Emily A EtonDepartment of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, USA.ORCID https://orcid.org/0000-0003-4212-7184
Thomas J WubbenDepartment of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, USA.
Cagri G BesirliDepartment of Ophthalmology and Visual Sciences, Kellogg Eye Center, University of Michigan, Ann Arbor, MI, USA.
Peiying HuaCenter for Preventive Ophthalmology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
Brendan McGeehanCenter for Preventive Ophthalmology and Biostatistics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
Brian L VanderBeekDepartment of Ophthalmology, Scheie Eye Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.ORCID https://orcid.org/0000-0003-4953-118X
University of Michigan · USUniversity of Pennsylvania · USPenn Presbyterian Medical Center · US

Funding

Scientific TransparencyP30EY001583 · NEI · UNIVERSITY OF PENNSYLVANIA · PI CLAIRE H MITCHELL · 1985 to 2026
$19.5M
Metabolic Reprogramming for Photoreceptor NeuroprotectionR01EY029675 · NEI · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI BESIRLI, CAGRI · 2019 to 2023
$2.1M
Glutamine as an alternative fuel source for photoreceptorsK08EY031757 · NEI · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI WUBBEN, THOMAS JOSEPH · 2020 to 2024
$1.2M
Patient Centered Care for Diabetic Macular EdemaK23EY025729 · NEI · UNIVERSITY OF PENNSYLVANIA · PI VANDERBEEK, BRIAN L. · 2015 to 2019
$1.1M
NEI NIH HHS K08 EY031757NEI NIH HHS K23 EY025729NEI NIH HHS P30 EY001583NEI NIH HHS R01 EY029675
6 · The paper itself

Abstract

purposeTo assess whether metformin is associated with dry age-related macular degeneration (dAMD) development.

methodsIn this retrospective cohort study, patients enrolled in a nationwide U.S. medical insurance claims database from 2002 to 2016 were included if they had diabetes mellitus, were ⩾55 years old, and were enrolled for ⩾2 years without a prior AMD diagnosis. The primary exposure was metformin use analyzed as either active or prior use or cumulative metformin dosage over the study period. A time updating Cox proportional hazard regression was used to estimate the hazard ratio of dAMD incidence with metformin exposure.

resultsAmong 1,007,226 diabetic enrollees, 53.3% were female and 66.4% were white with a mean hemoglobin A1c of 6.8%. Of eligible enrollees, 166,115 (16.5%) were taking metformin at the index date. Over the study period, 29,818 (3.0%) participants developed dAMD. In the active versus prior use of metformin model, active use conferred an increased hazard of developing dAMD (HR, 1.08; 95% CI, 1.04-1.12) while prior use had a decreased hazard (HR, 0.95; 95% CI 0.92-0.98). The cumulative metformin dosage model showed a significant trend toward increased hazard of dAMD incidence with increasing cumulative dosage (

conclusionsSmall, conflicting associations between metformin exposure and development of dAMD were observed depending on cumulative dosage and whether drug use was active, suggesting metformin did not substantially affect the development of dAMD.

Indexed as

Diabetes Mellitus, Type 2InsuranceMacular DegenerationMetforminFemaleHumansHypoglycemic AgentsIncidenceMiddle AgedProportional Hazards ModelsRetrospective StudiesRisk FactorsHypoglycemic AgentsMetforminAge-related macular degenerationdiabetes mellitusdry age-related macular degenerationmetforminretrospective cohort study

Identifiers

PMID33607930
PMCPMC8374004
OpenAlexW3130475111

What OpenQuestion holds

Texttitle and abstract
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.