Table 5.
Comparison of vascular density, perfusion density, and foveal avascular zone metrics between two consecutive macular angiography scans (n = 25).
| First measurement (signal strength = 8) |
Second measurement (signal strength = 9) |
p-value | |
|---|---|---|---|
| VD | |||
| 6-mm (entire area; mean ± SD, mm−1) | 15.33 ± 1.93 | 16.70 ± 1.33 | <0.001 |
| 1-mm (center; mean ± SD, mm−1) | 6.70 ± 3.25 | 8.11 ± 2.96 | 0.001 |
| PD | |||
| 6-mm (entire area; mean ± SD) | 0.37 ± 0.05 | 0.40 ± 0.04 | <0.001 |
| 1-mm (center; mean ± SD) | 0.14 ± 0.08 | 0.18 ± 0.07 | 0.002 |
| FAZ | |||
| Entire area (mean ± SD, mm2) | 0.18 ± 0.09 | 0.22 ± 0.10 | 0.043 |
| Perimeter (mean ± SD, mm) | 1.79 ± 0.43 | 1.84 ± 0.46 | 0.833 |
| Circularity (mean ± SD) | 0.68 ± 0.09 | 0.74 ± 0.08 | 0.013 |
VD = vessel density; PD = perfusion density; FAZ = foveal avascular zone; SD = standard deviation.
The p-value was obtained using a Wilcoxon signed rank test.
Boldface numbers indicate statistically significant differences at p < 0.05.