Abstract
Purpose
To investigate the rate and timing of switching between ranibizumab and aflibercept and to evaluate the difference in the switching rates among the different subtypes of neovascularization.
Methods
This retrospective study included 386 patients (386 eyes) who had been diagnosed with neovascular age-related macular degeneration (AMD) or polypoidal choroidal vasculopathy (PCV) and treated with ranibizumab (ranibizumab group, n = 260) or aflibercept (aflibercept group, n = 126). The rate and timing of switching from ranibizumab to aflibercept or vice versa were evaluated. Within the ranibizumab and the aflibercept groups, the switching rates were compared among the 3 subtypes of neovascularization: PCV, type 1 or 2 neovascularization, and type 3 neovascularization.
Results
During the mean 44.9 ± 15.9 months of follow-up period, switching rate was significantly higher in the ranibizumab group (28.8%, 75 patients) than in the aflibercept group (9.5%, 12 patients) (P < 0.001). No difference was observed in the mean duration between the diagnosis and switching among the ranibizumab (18.7 ± 14.6 months) and the aflibercept groups (14.8 ± 14.5 months) (P = 0.379). In the ranibizumab group, the switching rate was markedly higher in PCV (39.6%) than in type 1 or 2 neovascularization (17.6%) or in type 3 neovascularization (13.3%) (P < 0.001). In the aflibercept group, there was no significant difference in the switching rates among the subtypes of neovascularization (P = 0.811).
Conclusions
Although the timings of switching were similar, switching rate was higher in patients undergoing ranibizumab therapy than in those undergoing aflibercept therapy. The switching rate was especially higher in PCV patients undergoing ranibizumab therapy.
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Kim’s Eye Hospital (Seoul, South Korea) provided funding for English editing support. The sponsor had no role in the design or conduct of this research.
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The study was approved by the institutional review board of Kim’s Eye Hospital (Seoul, South Korea). This study was conducted in accordance with the tenets of the Declaration of Helsinki.
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Kim, J.H., Kim, J.W., Kim, C.G. et al. Long-term switching between ranibizumab and aflibercept in neovascular age-related macular degeneration and polypoidal choroidal vasculopathy. Graefes Arch Clin Exp Ophthalmol 258, 1677–1685 (2020). https://doi.org/10.1007/s00417-020-04710-y
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DOI: https://doi.org/10.1007/s00417-020-04710-y