Abstract
Background/Purpose:To define "strong" versus "weak" antivascular endothelial growth factor (anti-VEGF) treatment response in eyes with center-involved diabetic macular edema (CI-DME).Methods:Exploratory analyses of three DRCR Retina Network randomized trials of eyes with CI-DME treated with aflibercept, bevacizumab, or ranibizumab. Thresholds of 5-, 10-, and 15-letter gain defined strong visual acuity (VA) response when baseline VA was 20/25-20/32, 20/40-20/63, or 20/80-20/320, respectively. Thresholds of 50, 100, or 200-µm reduction defined strong anatomical response when baseline central subfield thickness (CST) was <75, ≥75 to <175, or ≥175-µm above standard thresholds. Additional thresholds from regression equations were calculated.Results:At 24 weeks, outcomes for strong response were achieved by 476 of 958 eyes (50%) for VA and 505 eyes (53%) for CST. At 104 weeks among the 32% of eyes with strong VA and CST response at 24 weeks, 195 of 281 (69%) maintained strong VA and CST response, whereas 20 (7%) had neither strong VA nor strong CST response. Outcomes rates were similar across protocols and when defined using regression equations.Conclusion:These phenotypes are suitable for efforts to identify predictive biomarkers for response to anti-VEGF therapy for DME and might facilitate comparison of treatment response among diverse cohorts with DME.
Original language | English (US) |
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Pages (from-to) | 616-623 |
Number of pages | 8 |
Journal | Retina |
Volume | 43 |
Issue number | 4 |
DOIs | |
State | Published - Apr 1 2023 |
Funding
Research reported in this publication was supported by the National Eye Institute and the National Institute of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health under Award Number UG1EY014231. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. Regeneron provided funding and aflibercept for Protocols T and V; Genentech provided funding and ranibizumab for Protocols I and T (bevacizumab compounded by a central pharmacy was used off-label in protocol T); Allergan provided funding and study drug for Protocol I. The DRCR Retina Network had complete control over the design of the protocol, ownership of the data, all editorial content of presentations and publications related to the protocol, and the decision to submit for publication.
Keywords
- antivascular endothelial growth factor
- diabetic macular edema
- phenotypes
ASJC Scopus subject areas
- Ophthalmology