Table 3 Sub-group analysis between severe NPDR and PDR.
OCTA metrics | Severe NPDR N = 11 | PRP done N = 41 | No PRP N = 12 | P value PRP vs. PDR without PRP | P value Severe NPDR vs. PRP | P value Severe NPDR vs. w/o PRP |
|---|---|---|---|---|---|---|
CC flow voids density, % | ||||||
All | 17.37 (1.53) | 18.07 (1.45) | 18.20 (1.65) | 0.5217 | 0.1178 | 0.1335 |
>200 μm2 | 16.00 (1.65) | 16.44 (1.58) | 16.67 (1.59) | 0.6611 | 0.4142 | 0.3287 |
>400 μm2 | 13.78 (1.83) | 14.18 (1.96) | 14.44 (1.81) | 0.5636 | 0.3074 | 0.3927 |
>600 μm2 | 11.90 (1.93) | 12.42 (2.16) | 12.72 (2.01) | 0.6071 | 0.3074 | 0.3293 |
>800 μm2 | 10.33 (1.98) | 11.08 (2.24) | 11.21 (2.14) | 0.7932 | 0.2299 | 0.3205 |
Superficial FAZ | ||||||
Area, mm2 | 0.297 | 0.6899 | 0.2875 | 0.297 | 0.6899 | 0.2875 |
Perimeter, mm | 2.88 (0.65) | 3.33 (0.93) | 4.13 (1.93) | 0.0795 | 0.2137 | 0.0056 |
Circularity | 1.31 (0.29) | 1.49 (0.38) | 1.64 (0.38) | 0.1142 | 0.1602 | 0.0036 |
Deep FAZ | ||||||
Area, mm2 | 2.26 (0.62) | 1.85 (0.69) | 2.07 (0.87) | 0.3672 | 0.0779 | 0.5452 |
Perimeter, mm | 6.12 (1.99) | 6.68 (2.78) | 6.65 (1.75) | 0.3599 | 0.583 | 0.2351 |
Circularity | 1.17 (0.35) | 1.44 (0.57) | 1.39 (0.50) | 0.7932 | 0.1348 | 0.5658 |
SCP_PD | 13.35 (2.17) | 11.05 (1.91) | 11.98 (1.91) | 0.1433 | 0.0017 | 0.0268 |
SCP_ LV_PD | 8.66 (1.01) | 8.53 (1.44) | 8.72 (1.15) | 0.9749 | 0.9121 | 0.8934 |
SCP_noLV_PD | 7.83 (1.96) | 6.06 (2.00) | 6.73 (1.75) | 0.1532 | 0.0055 | 0.1693 |
SCP_VD | 11.10 (1.79) | 9.41 (1.88) | 10.06 (1.86) | 0.2964 | 0.0029 | 0.2115 |
SCP_noLV_VD | 7.51 (1.77) | 6.13 (1.99) | 6.64 (1.72) | 0.2332 | 0.0099 | 0.2414 |
DCP_PD | 8.78 (1.78) | 7.93 (2.44) | 8.59 (1.93) | 0.398 | 0.2896 | 0.8088 |
DCP_VD | 7.53 (1.50) | 7.06 (2.23) | 7.46 (1.64) | 0.567 | 0.507 | 0.9075 |
