Table 2
NFBD detection by the three observers (actual situation: 16 eyes with NFBD, 44 controls, and in parentheses 23 eyes from the glaucoma patients without detectable NFBD on red free photography)
| n = 60 (83) | NFBD: yes | NFBD: no |
|---|---|---|
| Expert 1 (SK) | ||
| NFBD: yes | 6 | 0 (5) |
| NFBD: no | 10 | 44 (62) |
| Sensitivity | 37.5% | |
| Specificity | 100% (92.5%) | |
| Expert 2 (UH) | ||
| NFBD: yes | 6 | 0 (8) |
| NFBD: no | 10 | 44 (59) |
| Sensitivity | 37.5% | |
| Specificity | 100% (88.1%) | |
| Untrained GDx user (KUL) | ||
| NFBD: yes | 2 | 4 (8) |
| NFBD: no | 14 | 40 (59) |
| Sensitivity | 12.5% | |
| Specificity | 90.9% (88.1%) |
