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Comparison of two field versus examination
| Two field digital photography | |||||
| No DR or non-referable DR | Referable DR | Subtotal | Unassessable | ||
| Reference standard result (ophthalmologist’s examination findings) | No DR or non-referable DR | 222 | 17 | 239 | 1 |
| 92.9% | 7.1% | 100% | |||
| Referable DR | 40 | 193 | 233 | 5 | |
| 17.2% | 82.8% | 100% | |||
| Total | 262 | 210 | 472 | 6 | |
| 55.5% | 44.5% | 100% | |||
