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• W3186278364 abstract "This study aims to compare the structural differences in the optic disc blood perfusion and the peripapillary retinal nerve fibre layer (pRNFL) thickness in age-matched healthy subjects and patients with type 2 diabetes mellitus (DM) by using quantitative analysis with optical coherence tomography angiography (OCTA).A cross-sectional cohort study on patients with type 2 DM with or without diabetic retinopathy (DR) and healthy subjects was conducted. The 4.5-mm scanning angio-disc pattern of the OCTA system was used to assess the optic disc. The analysed indices included radial peripapillary capillary (RPC) vessel density and pRNFL thickness.A total of 78 eyes from 78 patients with type 2 DM, including 27 without clinical DR (NDR), 26 with non-proliferative DR (NPDR), and 25 with proliferative DR (PDR), and 28 age-matched healthy subjects were enrolled. The average RPC vessel density of the whole (p < 0.001) and the peripapillary (p < 0.001) regions was significantly different in different groups, whereas the pRNFL was not statistically significant (p = 0.764). Compared with that in healthy subjects, the RPC vessel densities in 4, 5, and 8 peripapillary sectors in NDR (all p < 0.05), NPDR (all p < 0.05), and PDR (all p < 0.05) groups, respectively, were reduced. Compared with that in healthy subjects, the pRNFL thickness significantly decreased in the inferior nasal sector (p = 0.001) in NDR but significantly increased in the 2 sectors (all p < 0.01) in PDR. The DR severity was negatively correlated with the peripapillary RPC vessel density (r = -0.583, p < 0.001) but had no correlation with the pRNFL thickness (r = -0.045, p = 0.648). The positive correlation between the peripapillary RPC vessel density and the pRNFL thickness was statistically significant in the control (r = 0.531, p = 0.004), NDR (r = 0.528, p = 0.004), and NPDR (r = 0.405, p = 0.040) groups but not in the PDR group (r = 0.394, p = 0.05).The peripapillary RPC perfusion decreased with DR aggravation, which may be considered as a useful indicator of DR severity. However, the pRNFL thickness had little diagnostic power in differentiating healthy and DM eyes." @default.
• W3186278364 created "2021-08-02" @default.
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• W3186278364 date "2021-01-01" @default.
• W3186278364 modified "2023-09-30" @default.
• W3186278364 title "Quantitative Analysis of the RPC Vessel Density and the RNFL Thickness in Patients with Type 2 Diabetes Mellitus by Using OCT Angiography" @default.
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• W3186278364 doi "https://doi.org/10.1159/000517145" @default.
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