Evidence map›Paper›PMID 35970234›Full record

SynthesisSurvey of ophthalmology

Delayed anti-VEGF injections during the COVID-19 pandemic and changes in visual acuity in patients with three common retinal diseases: A systematic review and meta-analysis.

James H B Im, Ya-Ping Jin, Ronald Chow, Riddhi Shah Dharia, Peng Yan

Open access · greenAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Survey of ophthalmology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
4.5field-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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Nonadherence to anti-VEGF intravitreal injections in patients with diabetic macular edema : The names of the authors.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Review
  6. Article
  7. Review
  8. The ambition for a one-and-done vision-saving AAV vector.Molecular therapy. Methods & clinical development · 2025
    Article
  9. Article
  10. Article
  11. Article
  12. 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

5 authors at 2 institutions in 1 country.

James H B ImDalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.
Ya-Ping JinDalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Canada.
Ronald ChowTemerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
Riddhi Shah DhariaDepartment of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Canada.
Peng YanDepartment of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Canada; Kensington Vision and Research Centre, Toronto, Canada. Electronic address: pyan@KensingtonHealth.org.
University of Toronto · CAKensington Health · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The COVID-19 pandemic disrupted the regular injections of anti-vascular endothelial growth factor (anti-VEGF) in patients with various retinal diseases globally. It is unclear to what extent delayed anti-VEGF injections have worsened patients' visual acuity. We performed a meta-analysis to assess the impact of delayed anti-VEGF injections on the best-corrected visual acuity (BCVA) in patients with neovascular age-related macular degeneration (nAMD), retinal vein occlusion (RVO), and diabetic macular edema (DME). We searched four computer databases (EMBASE, MEDLINE, Web of Science, Scopus) from inception to January 5, 2022. Data were pooled using the random-effects model. Results were reported by less than 4 months and 4 months or longer for the time period between the first injection during the pandemic and the last pre-pandemic injection. All BCVA measures were converted to the logarithm of the minimum angle of resolution (logMAR) for analyses. Among patients who received injections 4 months or longer apart, the mean difference in BCVA was 0.10 logMAR (or 5 ETDRS letters) (95% confidence interval [CI] 0.06∼0.14) for nAMD patients, 0.01 logMAR (or∼ 1 ETDRS letter) (95% CI -0.25∼0.27) for RVO patients, and 0.03 logMAR (or ∼1 ETDRS letters) (95% CI -0.06∼0.11) for DME patients. These results suggest that patients with nAMD needing scheduled anti-VEGF injections may require priority treatment over those with RVO and DME in the event of disturbed anti-VEGF injections from COVID-19 lockdowns or similar scenarios.

Indexed as

COVID-19Diabetic RetinopathyMacular EdemaRetinal DiseasesRetinal Vein OcclusionAngiogenesis InhibitorsBevacizumabCommunicable Disease ControlEndothelial Growth FactorsHumansIntravitreal InjectionsPandemicsRanibizumabVascular Endothelial Growth Factor AVisual AcuityAngiogenesis InhibitorsBevacizumabEndothelial Growth FactorsRanibizumabVascular Endothelial Growth Factor ACOVID-19Diabetic macular edemaNeovascular age-related macular degenerationRetinal vein occlusionSystematic review and meta-analysis

Identifiers

PMID35970234
PMCPMC9374495
OpenAlexW4291110440

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.