Diabetic retinopathy grading agreement (by person) between clinical examination during survey and retinal photograph graded by retinal specialist
| κ | % Agreement (%) | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) | |
| Retinopathy grade | 0.59 | 75 | ||||
| Maculopathy grade* | 0.63 | 85 | ||||
| None/background/sight-threatening DR† | 0.61 | 77 | ||||
| Sight-threatening DR | 0.67 | 90 | 80 | 91 | 70 | 95 |
| Any retinopathy | 0.72 | 87 | 83 | 89 | 85 | 88 |
| Any maculopathy | 0.69 | 88 | 82 | 90 | 73 | 94 |
| Any retinopathy/maculopathy | 0.70 | 85 | 84 | 86 | 81 | 88 |
↵* Exact retinopathy (R0, R1, R2, R3, R4) or maculopathy (M0, M1, M2) grade.
↵† None: no diabetic retinopathy (R0); background: background retinopathy mild, observable, referable (R1–R3) and/or observable maculopathy (M1); sight-threatening diabetic retinopathy: proliferative diabetic retinopathy (R4) and/or referable maculopathy (M2).