Neil M Bressler1, Wesley T Beaulieu2, Maureen G Maguire3, Adam R Glassman4, Kevin J Blinder5, Susan B Bressler1, Victor H Gonzalez6, Lee M Jampol7, Michele Melia4, Jennifer K Sun8, John A Wells9. 1. Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. 2. Jaeb Center for Health Research, Tampa, Florida, USA. Electronic address: drcrstat8@jaeb.org. 3. University of Pennsylvania, Philadelphia, Pennsylvania, USA. 4. Jaeb Center for Health Research, Tampa, Florida, USA. 5. The Retina Institute, St Louis, Missouri, USA. 6. Valley Retina Institute, McAllen, Texas, USA. 7. Feinberg School of Medicine, Northwestern University Medical School, Chicago, Illinois, USA. 8. Joslin Diabetes Center, Beetham Eye Institute, Harvard Department of Ophthalmology, Boston, Massachusetts, USA. 9. Palmetto Retina Center, Columbia, South Carolina, USA.
Abstract
PURPOSE: Assess associations of 2-year visual acuity (VA) outcomes with VA and optical coherence tomography central subfield thickness (CST) after 12 weeks of anti-vascular endothelial growth factor treatment for diabetic macular edema in DRCR.net Protocol T. DESIGN: Randomized clinical trial. METHODS: Setting: Multicenter (89 U.S. sites). PATIENT POPULATION: Eyes with VA and CST data from baseline and 12-week visits (616 of 660 eyes randomized [93.3%]). INTERVENTION: Six monthly injections of 2.0 mg aflibercept, 1.25 mg bevacizumab, or 0.3 mg ranibizumab; subsequent injections and focal/grid laser as needed for stability. MAIN OUTCOME MEASURES: Change in VA from baseline and VA letter score at 2 years. RESULTS: Twelve-week VA response was associated with 2-year change in VA and 2-year VA letter score for each drug (P < .001) but with substantial individual variability (multivariable R2 = 0.38, 0.29, and 0.26 for 2-year change with aflibercept, bevacizumab, and ranibizumab, respectively). Among eyes with less than 5-letter gain at 12 weeks, the percentages of eyes gaining 10 or more letters from baseline at 2 years were 42% (20 of 48), 31% (21 of 68), and 47% (28 of 59), and median 2-year VA was 20/32, 20/32, and 20/25, in the aflibercept, bevacizumab, and ranibizumab groups, respectively. Twelve-week CST response was not strongly associated with 2-year outcomes. CONCLUSIONS: A suboptimal response at 12 weeks did not preclude meaningful vision improvement (ie, ≥ 10-letter gain) in many eyes at 2 years. Eyes with less than 5-letter gain at 12 weeks often had good VA at 2 years without switching therapies.
RCT Entities:
PURPOSE: Assess associations of 2-year visual acuity (VA) outcomes with VA and optical coherence tomography central subfield thickness (CST) after 12 weeks of anti-vascular endothelial growth factor treatment for diabetic macular edema in DRCR.net Protocol T. DESIGN: Randomized clinical trial. METHODS: Setting: Multicenter (89 U.S. sites). PATIENT POPULATION: Eyes with VA and CST data from baseline and 12-week visits (616 of 660 eyes randomized [93.3%]). INTERVENTION: Six monthly injections of 2.0 mg aflibercept, 1.25 mg bevacizumab, or 0.3 mg ranibizumab; subsequent injections and focal/grid laser as needed for stability. MAIN OUTCOME MEASURES: Change in VA from baseline and VA letter score at 2 years. RESULTS: Twelve-week VA response was associated with 2-year change in VA and 2-year VA letter score for each drug (P < .001) but with substantial individual variability (multivariable R2 = 0.38, 0.29, and 0.26 for 2-year change with aflibercept, bevacizumab, and ranibizumab, respectively). Among eyes with less than 5-letter gain at 12 weeks, the percentages of eyes gaining 10 or more letters from baseline at 2 years were 42% (20 of 48), 31% (21 of 68), and 47% (28 of 59), and median 2-year VA was 20/32, 20/32, and 20/25, in the aflibercept, bevacizumab, and ranibizumab groups, respectively. Twelve-week CST response was not strongly associated with 2-year outcomes. CONCLUSIONS: A suboptimal response at 12 weeks did not preclude meaningful vision improvement (ie, ≥ 10-letter gain) in many eyes at 2 years. Eyes with less than 5-letter gain at 12 weeks often had good VA at 2 years without switching therapies.
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