Table 2.
Percentage of 2D Retinal Nerve Fiber Layer Scans with Artifacts
| Glaucoma (n = 106) | Normal (n = 95) | ||
|---|---|---|---|
| Artifact Type | Percentage of B-scans (%)a | Percentage of B-scans (%)a | P |
| Posterior RNFL misidentification | 46.2 | 5.3 | <0.001*** |
| Decentration | 10.4 | 8.4 | 0.64 |
| Anterior RNFL misidentification | 9.4 | 3.2 | 0.07 |
| PVD/ERM | 4.7 | 2.1 | 0.32 |
| Degraded image | 2.8 | 0 | 0.10 |
| Peripapillary atrophy | 1.9 | 0 | 0.18 |
| Complete absence of segmentation | 0 | 0 | N/A |
| Out of register | 0 | 0 | N/A |
| Cut edge | 0 | 0 | N/A |
| Mirroring | 0 | 0 | N/A |
| Missing parts | 0 | 0 | N/A |
| Motion artifact | 0 | 0 | N/A |
| Any artifact (total percentage)b | 58.5 | 14.7 | <0.001*** |
a
Proportion of 2D retinal nerve fiber layer scans with the specified artifact type divided by 106 for the glaucoma group and 95 for the normal group.
b
Total percentage represents the total percentage of 2D retinal nerve fiber layer scans with at least one artifact type. Scans with multiple artifacts were only counted once.
***
Results are statistically significant.