Table 4.
Proposed tomographic cutoff values for KCN disease progression in naïve fellow eyes (N = 49).
| Variable | Cutoff value | Sensitivity (%) | Specificity (%) | % Correctly Classified∗ |
|---|---|---|---|---|
| K1 | ≥43.5 | 78.95 | 66.67 | 71.43% |
| K2 | ≥45.1 | 84.21 | 66.67 | 73.47% |
| Km | ≥44.3 | 78.95 | 63.33 | 69.39% |
| Front Kmax | ≥47.9 | 84.21 | 76.67 | 79.59% |
| Astigmatism | ≥1.4 | 94.74 | 60.00 | 73.47% |
| Pachymetry at the pupil | <475 | 93.33 | 63.16 | 81.63% |
| Thinnest pachymetry | <478 | 80.00 | 73.68 | 77.55% |
∗ Percent of naïve fellow eyes correctly classified as progressors or nonprogressors using the predetermined cutoff values. All keratometry readings are presented in Diopters and pachymetry values are presented in μm.