Table 2.
Generalized Estimating Equation Analysis of OCTA Parameters.
| OCTA Parameter | DLB Group | Control Group | P Valuea |
|---|---|---|---|
| 3 mm × 3 mm perfusion density | |||
| Eyes (n) | 30 | 85 | |
| Mean ± SD | 0.347 ± 0.031 | 0.355 ± 0.029 | .326 |
| Median | 0.348 | 0.356 | |
| Range | 0.287, 0.394 | 0.285, 0.406 | |
| 3 mm × 3 mm ring perfusion density | |||
| Eyes (n) | 30 | 85 | |
| Mean ± SD | 0.366 ± 0.029 | 0.375 ± 0.030 | .206 |
| Median | 0.367 | 0.378 | |
| Range | 0.304, 0.412 | 0.299, 0.425 | |
| 3 mm × 3 mm vessel density (mm−1) | |||
| Eyes (n) | 30 | 85 | |
| Mean ± SD | 19.1 ± 1.8 | 19.7 ± 1.6 | .187 |
| Median | 19.4 | 19.7 | |
| Range | 15.4, 22.3 | 15.3, 22.7 | |
| 3 mm × 3 mm ring vessel density (mm−1) | |||
| Eyes (n) | 30 | 85 | |
| Mean ± SD | 20.1 ± 1.7 | 20.8 ± 1.7 | .103 |
| Median | 20.1 | 20.9 | |
| Range | 16.2, 22.7 | 16.0, 24.2 | |
| 6 mm × 6 mm perfusion density | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 0.419 ± 0.043 | 0.423 ± 0.041 | .692 |
| Median | 0.432 | 0.434 | |
| Range | 0.288, 0.463 | 0.284, 0.475 | |
| 6 mm × 6 mm inner ring perfusion density | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 0.406 ± 0.055 | 0.417 ± 0.045 | .372 |
| Median | 0.414 | 0.432 | |
| Range | 0.245, 0.458 | 0.274, 0.478 | |
| 6 mm × 6 mm outer ring perfusion density | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 0.430 ± 0.040 | 0.433 ± 0.041 | .845 |
| Median | 0.441 | 0.448 | |
| Range | 0.310, 0.474 | 0.294, 0.490 | |
| 6 mm × 6 mm vessel density (mm−1) | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 17.1 ± 1.7 | 17.1 ± 2.0 | .952 |
| Median | 17.5 | 17.8 | |
| Range | 12.1, 19.0 | 8.4, 19.3 | |
| 6 mm × 6 mm inner ring vessel density (mm−1) | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 16.9 ± 2.1 | 17.4 ± 1.7 | .272 |
| Median | 17.5 | 17.8 | |
| Range | 10.5, 19.1 | 12.1, 19.5 | |
| 6 mm × 6 mm outer ring vessel density (mm−1) | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 17.5 ± 1.5 | 17.6 ± 1.5 | .792 |
| Median | 17.9 | 18.1 | |
| Range | 12.9, 19.2 | 12.5, 19.6 | |
| Foveal avascular zone (mm2) | |||
| Eyes (n) | 27 | 85 | |
| Mean ± SD | 0.207 ± 0.087 | 0.220 ± 0.095 | .605 |
| Median | 0.210 | 0.200 | |
| Range | 0.060, 0.360 | 0.060, 0.450 | |
| Average capillary perfusion density | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 0.444 ± 0.015 | 0.434 ± 0.015 | .005 b |
| Median | 0.445 | 0.437 | |
| Range | 0.406, 0.476 | 0.389, 0.474 | |
| Average capillary flux index | |||
| Eyes (n) | 28 | 85 | |
| Mean ± SD | 0.421 ± 0.026 | 0.439 ± 0.031 | .016 b |
| Median | 0.424 | 0.439 | |
| Range | 0.365, 0.463 | 0.363, 0.502 | |
Abbreviations: DLB, dementia with Lewy bodies; OCTA, optical coherence tomography angiography.
a
P value is based on test of difference between means using generalized estimating equations.
b
Statistically significant.