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Impact of Early Anatomical and Functional Responses to Bevacizumab in Macular Edema Secondary to Branch Retinal Vein Occlusion.
PURPOSE: To evaluate whether early anatomical and visual acuity (VA) responses to intravitreal bevacizumab (IVB) in macular edema secondary to branch retinal vein occlusion (BRVO) are associated with 1-year follow-up outcomes.
METHODS: Ninety-nine treatment-naïve patients (99 eyes) with macular edema after BRVO treated with IVB were analyzed retrospectively. All patients received single injection and were followed up with pro re nata regimen for at least 12 months. The relationship between early (1 month) and late (12 months) anatomical (presence/absence of fluid) and functional response (an improvement of <1, 1 to <3, or ≥3 logMAR lines from baseline in best corrected VA, BCVA) was explored.
RESULTS: Fifty-eight eyes (58.6%) had absence of fluid at 1 month after the first injection, but 41 eyes (41.4%) did not. Those with absence of fluid at 1 month were more likely to be fluid-free at 12 months (p = 0.010). Thirty-seven (37.4%), 24 (24.2%), and 38 (38.4%) eyes showed an improvement of <1, 1 to <3, and ≥3 lines, respectively, at 1 month after the first injection. Intercohort differences across three response categories in BCVA change from baseline were statistically significant throughout the follow-up. Each group maintained stable VA changes within 1 line during the follow-up after 1 month.
CONCLUSION: The early anatomical and functional response was associated with anatomical and functional improvement at 12 months.
METHODS: Ninety-nine treatment-naïve patients (99 eyes) with macular edema after BRVO treated with IVB were analyzed retrospectively. All patients received single injection and were followed up with pro re nata regimen for at least 12 months. The relationship between early (1 month) and late (12 months) anatomical (presence/absence of fluid) and functional response (an improvement of <1, 1 to <3, or ≥3 logMAR lines from baseline in best corrected VA, BCVA) was explored.
RESULTS: Fifty-eight eyes (58.6%) had absence of fluid at 1 month after the first injection, but 41 eyes (41.4%) did not. Those with absence of fluid at 1 month were more likely to be fluid-free at 12 months (p = 0.010). Thirty-seven (37.4%), 24 (24.2%), and 38 (38.4%) eyes showed an improvement of <1, 1 to <3, and ≥3 lines, respectively, at 1 month after the first injection. Intercohort differences across three response categories in BCVA change from baseline were statistically significant throughout the follow-up. Each group maintained stable VA changes within 1 line during the follow-up after 1 month.
CONCLUSION: The early anatomical and functional response was associated with anatomical and functional improvement at 12 months.
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