TY - JOUR T1 - Effect of total anti-VEGF treatment exposure on patterns of choroidal neovascularisation assessed by optical coherence tomography angiography in age-related macular degeneration: a retrospective case series JF - BMJ Open Ophthalmology JO - BMJ Open Ophth DO - 10.1136/bmjophth-2018-000244 VL - 4 IS - 1 SP - e000244 AU - Livia Faes AU - Zaria Ali AU - Siegfried Wagner AU - Praveen J Patel AU - Dun Jack Fu AU - Lucas M Bachmann AU - Martin K Schmid AU - Nadia Waheed AU - Pearse A Keane AU - Konstantinos Balaskas Y1 - 2019/04/01 UR - http://bmjophth.bmj.com/content/4/1/e000244.abstract N2 - Objective To compare clinical characteristics of patients suffering from neovascular age-related macular degeneration (nAMD) with mature and immature choroidal neovascularisation (CNV) as assessed by optical coherence tomography angiography (OCTA). To explore the effect of total anti-vascular endothelial growth factor exposure on the occurrence of mature CNV when correcting for potential confounders.Methods and analysis In this retrospective case series, we included 40 eyes of 36 patients with nAMD with CNV assessed by OCTA at the Manchester Eye Hospital between June 2016 and June 2017. A retinal specialist masked to patient information graded CNV depicted on OCTA scans. For statistical comparisons, we used t-tests, Fisher’s exact tests and a mixed-effects logistic regression model.Results 18 patients (20 eyes) were treatment naïve, and the mean number of intravitreal injections (IVI) in the remaining eyes was 18.4 (range 2–71). The mean duration of nAMD was 19.3 months (range 0–87.4). 25 eyes (62.5%) exhibited mature CNV. Eyes with mature CNV did not differ from those with immature CNV regarding age (+2.8 years; p=0.288) or duration of disease (+9.4 months; p=0.061). However, they had a higher number of IVIs (+3.1; p=0.035). Among eyes with best corrected visual acuity over 25 letters, there was a strong association between the number of IVIs (0 vs 1–20: OR 68.01 [95% CI 1.30 to 3546.99; p=0.036], 0 vs >20 IVI: OR 380.01 [95% CI 2.60 to 55 464.89; p=0.019]) and maturity status when correcting for potential confounders.Conclusion Maturity status of CNV as assessed by OCTA may indicate treatment exposure of CNV in nAMD. ER -