From: Optical coherence tomography angiography metrics in different stages of diabetic macular edema
 | FAZ parameters | SVP | DVP |  | |||||
---|---|---|---|---|---|---|---|---|---|
DME severity | FAZ area (mm2) | FAZ perimeter (mm) | Acircularity index | FD-300 (%) | Whole VD (%) | Parafoveal VD (%) | Whole VD (%) | Parafoveal VD (%) | Foveal thickness (μm) |
Group I Early (n = 24) | 0.34 (0.22, 0.39) | 2.43 (1.94, 2.77) | 1.17 (1.14, 1.25) | 39.36 ± 5.58 | 35.74 ± 4.18 | 37.23 ± 4.86 | 41.71 ± 4.98 | 43.88 ± 5.54 | 320.00 ± 43.04 |
Group II Advanced (n = 53) | 0.28 (0.20, 0.38) | 2.32 (1.92, 2.66) | 1.18 (1.15, 1.27) | 40.59 ± 4.54 | 33.88 ± 4.39 | 35.26 ± 4.89 | 40.80 ± 5.35 | 42.91 ± 5.95 | 451.34 ± 88.39 |
Group III Severe (n = 15) | 0.30 (0.22, 0.46) | 2.41 (2.11, 3.48) | 1.24 (1.19, 1.55) | 41.72 ± 3.95 | 35.74 ± 5.24 | 36.67 ± 5.94 | 37.35 ± 5.86 | 37.70 ± 7.19 | 540.07 ± 220.79 |
P value* | 0.721 | 0.395 | 0.005 | 0.308 | 0.149 | 0.251 | 0.041 | 0.006 |  < 0.001 |
P value I vs. II |  |  |  > 0.999 |  |  |  |  > 0.999 | 0.515 |  < 0.001 |
P value II vs. III |  |  | 0.007 |  |  |  | 0.030 | 0.004 |  < 0.001 |
P value I vs. III |  |  | 0.009 |  |  |  | 0.015 | 0.003 |  < 0.001 |
P value (adjusted) *†| 0.721 | 0.856 | 0.016 | 0.143 | 0.809 | 0.710 | 0.023 | 0.007 |  < 0.001 |
P value I vs. II (adjusted) †|  |  | 0.954 |  |  |  | 0.337 | 0.407 |  < 0.001 |
P value II vs. III (adjusted) †|  |  | 0.003 |  |  |  | 0.035 | 0.012 |  < 0.001 |
P value I vs. III (adjusted) †|  |  | 0.006 |  |  |  | 0.018 | 0.005 |  < 0.001 |