Table 4

Comparison of TCT and ophthalmic diagnoses for all patients with pass/fail criterion of z = −1.75

Ophthalmological assessment
No retinopathyBackground retinopathyPreproliferative retinopathyProliferative retinopathyMaculopathyTotal
TCT (z ≤ −1.75)
    Normal365102100468 (92%)
    Abnormal188221242 (8%)
% of correct TCT diagnosis95.3%92.7%66.7%100%100%