Table 2.
Ocular factors and FAZ parameters of OCTA in non-high myopia (lower quartile) and high myopia (upper quartile) groups.
| Variables | Non-high myopia (n = 26) | High myopia (n = 27) | P Value |
|---|---|---|---|
| Axial length (mm) | 24.0 ± 0.9 (22.09 to 25.02) | 27.4 ± 0.4 (26.86 to 28.11) | < 0.001 |
| Spherical equivalent (diopter) | − 2.3 ± 1.6 (− 5.25 to − 0.25) | − 8.1 ± 2.1 (− 12.125 to − 6.25) | < 0.001 |
| Central corneal thickness (μm) | 539.65 ± 34.58 (490 to 594) | 554.81 ± 32.71 (498 to 603) | 0.908 |
| Foveal thickness (μm) | 247.73 ± 13.55 (214 to 267) | 252.74 ± 22.13 (209 to 297) | 0.200 |
| Parafoveal thickness (μm) | 315.19 ± 12.97 (296 to 342) | 311.33 ± 13.49 (287 to 343) | 0.323 |
| Subfoveal choroidal thickness (μm) | 317.88 ± 49.50 (182 to 393) | 203.11 ± 90.54 (80 to 371) | < 0.001 |
| Area of superficial FAZ (mm2) | 0.3 ± 0.08 (0.18 to 0.52) | 0.43 ± 0.22 (0.20 to 1.15) | 0.024 |
| Area of deep FAZ (mm2) | 0.45 ± 0.12 (0.23 to 0.68) | 0.66 ± 0.25 (0.33 to 1.36) | < 0.001 |
| Perimeter of superficial FAZ (mm) | 2.9 ± 0.46 (2.05 to 4.08) | 3.47 ± 1.41 (2.06 to 8.60) | 0.122 |
| Perimeter of deep FAZ (mm) | 3.96 ± 0.71 (2.79 to 5.62) | 4.87 ± 1.41 (2.82 to 8.93) | 0.005 |
| Circularity index of superficial FAZ | 0.48 ± 0.10 (0.29 to 0.67) | 0.48 ± 0.12 (0.20 to 0.67) | 0.873 |
| Circularity index of deep FAZ | 0.37 ± 0.06 (0.23 to 0.46) | 0.36 ± 0.09 (0.20 to 0.56) | 0.423 |
| Acircularity index of superficial FAZ | 1.47 ± 0.17 (1.22 to 1.85) | 1.49 ± 0.24 (1.22 to 2.27) | 0.873 |
| Acircularity index of deep FAZ | 1.67 ± 0.17 (1.47 to 2.11) | 1.69 ± 0.21 (1.33 to 2.26) | 0.423 |
| Axial ratio of superficial FAZ | 1.24 ± 0.19 (1.03 to 1.92) | 1.21 ± 0.20 (1.01 to 1.70) | 0.310 |
| Axial ratio of deep FAZ | 1.18 ± 0.13 (1.01 to 1.48) | 1.24 ± 0.17 (1.02 to 1.65) | 0.179 |
| Major axis length of superficial FAZ (mm) | 0.78 ± 0.11 (0.55 to 1.01) | 0.93 ± 0.34 (0.55 to 2.09) | 0.065 |
| Major axis length of deep FAZ (mm) | 0.93 ± 0.15 (0.67 to 1.31) | 1.13 ± 0.21 (0.82 to 1.71) | < 0.001 |
| Minor axis length of superficial FAZ (mm) | 0.64 ± 0.10 (0.44 to 0.87) | 0.77 ± 0.26 (0.43 to 1.72) | 0.012 |
| Minor axis length of deep FAZ (mm) | 0.79 ± 0.11 (0.60 to 1.02) | 0.92 ± 0.15 (0.72 to 1.34) | 0.003 |
FAZ foveal avascular zone.
Factors with statistical significance are shown in boldface.