Comparison of two field versus seven field
| Two field digital photography | |||||
|---|---|---|---|---|---|
| No DR or non-referable DR | Referable DR | Subtotal | Unassessable | ||
| Reference standard result (seven field stereo photography) | No DR or non-referable DR | 151 | 6 | 157 | 1 |
| 96.2% | 3.8% | 100% | |||
| Referable DR | 48 | 194 | 242 | 5 | |
| 19.8% | 80.2% | 100% | |||
| Total | 199 | 200 | 399 | 6 | |
| 49.9% | 50.1% | 100% | |||