Overall data | |||||
---|---|---|---|---|---|
Retinal parameter | No retinopathy group | Mild NPDR group | Severe NPDR group | PDR group | p value |
Mean ± (STD) | |||||
(242 bifurcations) | (310 bifurcations) | (372 bifurcations) | (594 bifurcations) | ||
Parent Vessel Diameter d 0 (pixels) | 6.97 ± (1.61)* | 8.39 ± (2.37) † | 8.56 ± (2.39)† | 8.98 ± (2.63)‡ | 0.000 |
Large Child Diameter d 1 (pixels) | 6.17 ± (1.56)* | 7.44 ± (2.30)† | 7.56 ± (2.34)† | 8.01 ± (2.52)‡ | 0.000 |
Smaller Child Diameter d 2 (pixels) | 4.66 ± (1.04)* | 5.47 ± (1.53)† | 5.51 ± (1.44)† | 5.76 ± (1.70)‡ | 0.000 |
Bifurcating Angle θ (Degrees) | 77.04 ± (15.6)* | 79.85 ± (17.4)*† | 80.02 ± (17.8)† | 83.23 ± (18.9)‡ | 0.000 |
Branching Angle θ 1 (Degrees) | 25.14 ± (14.1) | 25.12 ± (15.8) | 25.82 ± (15.2) | 25.05 ± (16.7) | 0.941 |
Branching Angle θ 2 (Degrees) | 51.97 ± (19.3)* | 55.01 ± (21.2)* | 54.84 ± (21.7)*† | 58.57 ± (23.7)† | 0.027 |
Junction Exponent χ | 3.33 ± (3.24)*† | 3.34 ± (3.17)*† | 3.30 ± (3.13)† | 3.55 ± (3.32)* | 0.050 |