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Table 3 Vascular density in deep capillary network (DCN) in normal subjects and subtypes of diabetic retinopathy (N = 188)

From: Quantitative assessment of vascular density in diabetic retinopathy subtypes with optical coherence tomography angiography

Groups
VD/
Reference group
NL (40 eyes)
Median (range)
(%)
NDR (39eyes)
Median (range)
(%)
NPDR (64eyes)
Median (range)
(%)
PDR (33eyes)
Median (range)
(%)
P-value
Kruskal –Wallis test
Whole image
Normal
NDR
NPDR
60.42
(47.00–64.55)
58.05
(51.34–60.64)
< 0.001*
53.84
(41.34–60.67)
< 0.001*
< 0.001*
51.24
(42.50–57.58)
< 0.001*
< 0.001*
< 0.001*
< 0.001
Fovea
Normal
NDR
NPDR
31.24
(20.30–42.32)
27.72
(20.28–35.46)
0.001*
27.14
(15.48–40.50)
< 0.001*
0.225
24.94
(12.19–39.30)
< 0.001*
0.050*
0.362*
< 0.001
Para-fovea
Normal
NDR
NPDR
62.89
(50.10–67.22)
60.77
(52.90–63.51)
< 0.001*
56.49
(42.94–62.75)
< 0.001*
< 0.001*
54.16
(42.88–59.89)
< 0.001*
< 0.001*
0.001*
< 0.001
Superior hemi
Normal
NDR
NPDR
63.45
(50.80–67.76)
61.02
(52.40–64.34)
< 0.001*
56.14
(44.02–62.61)
< 0.001*
< 0.001*
55.33
(41.19–61.91)
< 0.001*
< 0.001*
0.026*
< 0.001
Inferior hemi
Normal
NDR
NPDR
62.91
(49.50–66.68)
60.51
(52.17–63.94)
< 0.001*
55.96
(40.75–63.36)
< 0.001*
0.001*
54.07
(43.65–60.35)
< 0.001*
< 0.001*
< 0.001*
< 0.001
Temporal
Normal
NDR
NPDR
61.49
(48.50–64.82)
61.04
(49.90–63.36)
0.011*
53.33
(32.32–61.74)
< 0.001*
< 0.001*
53.31
(42.70–60.56)
< 0.001*
< 0.001*
0.004*
< 0.001
Superior
Normal
NDR
NPDR
64.82
(51.20–69.15)
62.09
(53.30–65.34)
< 0.001*
58.62
(45.35–63.41)
< 0.001*
< 0.001*
55.60
(42.14–60.70)
< 0.001*
< 0.001*
0.005*
< 0.001
Nasal
Normal
NDR
NPDR
62.56
(52.90–67.02)
59.17
(52.40–62.53)
< 0.001*
55.64
(35.39–63.44)
< 0.001*
0.001*
53.48
(39.92–59.70)
< 0.001*
< 0.001*
0.020*
< 0.001
Inferior
Normal
NDR
NPDR
63.76
(48.20–67.86)
62.09
(52.23–65.59)
< 0.001*
56.76
(43.45–64.21)
< 0.001*
0.013*
54.06
(44.73–61.92)
< 0.001*
< 0.001*
< 0.001*
< 0.001
  1. NDR: No diabetic retinopathy, NL: Normal, NPDR: Nonproliferative diabetic retinopathy, PDR: Proliferative diabetic retinopathy
  2. *Mann- Whitney test
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