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

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

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
  1. P values less than 0.05 were considered statistically significant
  2. Mann–Whitney test
  3. In the post-HOC analysis the reference groups were stated in the rows
  4. 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