Cross comparison of Nottingham grade (A) and grade component scores (B–D) between virtual microscopy* and traditional light microscopy
| (A) Grade (virtual microscopy) | Grade (light microscopy) | Total % | ||
| Grade 1 | Grade 2 | Grade 3 | ||
| Grade 1 | 232 | 215 | 25 | 28.2 |
| Grade 2 | 39 | 420 | 213 | 40.1 |
| Grade 3 | 1 | 48 | 482 | 31.7 |
| Total % | 16.2 | 40.8 | 43 | 100 |
| Per cent exact agreement: 68%, per cent adjacent level: 30.5%, per cent high/low: 1.5% | ||||