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Comparison of TCT and ophthalmic diagnoses for all patients with pass/fail criterion of z = −1.75
| Ophthalmological assessment | ||||||
| No retinopathy | Background retinopathy | Preproliferative retinopathy | Proliferative retinopathy | Maculopathy | Total | |
| TCT (z ≤ −1.75) | ||||||
| Normal | 365 | 102 | 1 | 0 | 0 | 468 (92%) |
| Abnormal | 18 | 8 | 2 | 2 | 12 | 42 (8%) |
| % of correct TCT diagnosis | 95.3% | 92.7% | 66.7% | 100% | 100% | |
