Interobserver Agreement Comparison Between 2 Readers at Each Visual Step (V1–V4)
| Reader 1 vs. reader 2 | Correlation | κ statistics |
| Step V1 | 0.88 | 0.77 |
| Step V2 | 0.87 | 0.82 |
| Step V3 | 0.83 | 0.83 |
| Step V4 | 0.85 | 0.82 |
All correlations and κ-agreements had P value < 0.001. V1 = NC only; V2 = NC + AC; V3 = NC + AC + computer; V4 = NC + AC + computer + clinical.