Table 3.
Optic nerve threshold values which optimise sensitivities, specificities, and positive and negative predictive values (with 95% CIs)
| Threshold | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) | |||||||||
| Value | LCI | UCI | Value | LCI | UCI | Value | LCI | UCI | Value | LCI | UCI | ||
| Cup:disc ratio | 0.5 | 81.5 | 61.2 | 93.7 | 80.0 | 56.3 | 94.3 | 84.6 | 69.2 | 93.1 | 76.19 | 58.5 | 87.9 |
| Cup diameter (°) | 2.8 | 74.1 | 53.7 | 88.9 | 70.0 | 45.7 | 88.1 | 76.9 | 62.2 | 87.1 | 66.7 | 49.9 | 80.1 |
| Cup depth (from rim edges) | 600 | 81.5 | 61.9 | 93.7 | 85.0 | 62.1 | 96.8 | 88.0 | 71.8 | 95.5 | 77.3 | 60.1 | 88.5 |
| Rim width (°) | 2.8 | 88.9 | 70.8 | 97.7 | 80.0 | 56.3 | 94.3 | 85.7 | 71.2 | 93.6 | 84.2 | 64.2 | 94.1 |
| Rim area (µm) | 400 | 88.9 | 70.8 | 97.7 | 75.0 | 50.9 | 91.3 | 82.8 | 69.0 | 91.2 | 83.3 | 62.6 | 93.7 |
LCI, lower CI;UCI, upper CI.