Arteriolar data | |||||
---|---|---|---|---|---|
Retinal parameter | No retinopathy group | Mild NPDR group | Severe NPDR group | PDR group | p value |
Mean ± (STD) | (117 bifurcations) | (136 bifurcations) | (139 bifurcations) | (231 bifurcations) | |
Parent Vessel Diameter d 0 (pixels) | 6.47 ± (1.08)* | 7.54 ± (1.68)† | 7.58 ± (1.65)† | 8.06 ± (1.84)‡ | 0.000 |
Large Child Diameter d 1 (pixels) | 5.78 ± (1.10)* | 6.65 ± (1.62)† | 6.73 ± (1.66)† | 7.23 ± (1.80)‡ | 0.000 |
Smaller Child Diameter d 2 (pixels) | 4.60 ± (0.99)* | 5.42 ± (1.37)† | 5.43 ± (1.33)† | 5.62 ± (1.43)† | 0.000 |
Bifurcating Angle θ (Degrees) | 76.13 ± (15.8)* | 79.14 ± (17.9)* | 78.78 ± (18.4)* | 84.33 ± (18.6)† | 0.000 |
Branching Angle θ 1 (Degrees) | 25.77 ± (15.2) | 27.32 ± (16.6) | 28.33 ± (15.4) | 27.44 ± (16.4) | 0.560 |
Branching Angle θ 2 (Degrees) | 50.36 ± (20.3)* | 51.99 ± (21.3)* | 50.45 ± (20.3)* | 56.88 ± (22.9)† | 0.014 |
Junction Exponent χ | 3.70 ± (1.27) | 3.80 ± (2.00) | 3.92 ± (1.85) | 4.15 ± (2.25) | 0.161 |
Venular data | |||||
Retinal parameter | No retinopathy group | Mild NPDR group | Severe NPDR group | PDR group | p value |
Mean ± (STD) | (125 bifurcations) | (174 bifurcations) | (233 bifurcations) | (363 bifurcations) | |
Parent Vessel Diameter d 0 (pixels) | 7.42 ± (1.87)* | 9.04 ± (2.62)† | 9.13 ± (2.56)†‡ | 9.55 ± (2.88)‡ | 0.000 |
Large Child Diameter d 1 (pixels) | 6.51 ± (1.83)* | 8.04 ± (2.55)†‡ | 8.05 ± (2.54)† | 8.50 ± (2.79)‡ | 0.000 |
Smaller Child Diameter d 2 (pixels) | 4.72 ± (1.08)* | 5.51 ± (1.64)† | 5.55 ± (1.47)† | 5.82 ± (1.85)‡ | 0.000 |
Bifurcating Angle θ (Degrees) | 77.68 ± (15.1) | 80.40 ± (16.9) | 80.75 ± (17.4) | 82.53 ± (19.1) | 0.062 |
Branching Angle θ 1 (Degrees) | 24.81 ± (12.9) | 23.43 ± (14.9) | 24.34 ± (15.0) | 23.53 ± (16.8) | 0.921 |
Branching Angle θ 2 (Degrees) | 53.00 ± (17.9) | 57.34 ± (20.9) | 57.43 ± (22.1) | 59.65 ± (23.7) | 0.504 |
Junction Exponent χ | 3.02 ± (0.96) | 2.99 ± (0.88) | 2.94 ± (0.99) | 3.18 ± (1.46) | 0.07 |