Vascular density of optic nerve head in diabetic retinopathy using optical coherence tomography angiography

Table 2 Vascular density in optic nerve head (ONH) of normal subjects and the diabetic patients (N = 176)

Groups VD/ Reference group	NL (37 eyes) Mean (%)	DR (138 eyes) Mean (%)	p value
Whole image	57.80 ± 2.68	55.64 ± 3.87	0.002
Whole disc	53.04 ± 4.15	51.41 ± 5.98	0.122
N-disc	51.78 ± 6.66	52.4 ± 7.9	0.657
IN-disc	56.82 ± 10.85	56.75 ± 2.68	0.972
IT-disc	53.16 ± 6.56	48.99 ± 9.97	0.017
ST-disc	52.11 ± 8.37	49.99 ± 9.46	0.218
SN-disc	57.12 ± 7.74	57.83 ± 8.97	0.661
T-disc	50.55 ± 6.80	45.71 ± 8.05	0.001
Whole RPC	62.26 ± 2.78	59.26 ± 4.42	< 0.001
N-RPC	60.53 ± 3.90	57.43 ± 6.05	0.004
IN-RPC	63.86 ± 3.37	60.14 ± 6.44	0.001
IT-RPC	65.62 ± 3.53	61.64 ± 5.89	< 0.001
ST-RPC	63.03 ± 4.44	60.69 ± 5.31	0.015
SN-RPC	61.81 ± 4.32	58.89 ± 7.37	0.023
T-RPC	61.95 ± 3.76	59.48 ± 4.82	0.004
PP blood CC flow-2 mm radius	7.56 ± 0.20	7.32 ± 0.81	0.089
PP blood CC flow- /area² mm radius	0.60 ± 0.01	0.59 ± 0.01	0.009

P values less than 0.05 were considered statistically significant
Mann–Whitney test
In the post-HOC analysis the reference groups were stated in the rows
CC: Choriocapillary; IT: Inferonasal; IT: Inferotemporal; NDR: No diabetic retinopathy; N: Nasal; NL: Normal; NPDR: Nonproliferative diabetic retinopathy; PDR: Proliferative diabetic retinopathy; PP: Peripapillary; RPC: Radial peripapillary capillary; SN: Supreronal; ST: Superotemporal; T: Temporal

ISSN: 2056-9920