Table 1.
Cross-tabulation of DR severity grading derived from ETDRS seven-field images and UWFSLO images
| DR grades using ETDRS seven-field view (ICDR severity scale) | DR grades using Optomap UWFSLO view (ICDR severity scale)
|
Total (%) | ||||||
|---|---|---|---|---|---|---|---|---|
| Very mild NPDR (20) | Mild NPDR (35) | Moderate NPDR (43, 47) | Severe NPDR (53 A to D) | Very severe NPDR (53 E) | Mild PDR (61) | Moderate PDR (65) | ||
| Very mild NPDR (20) | 16 | 18 | 0 | 0 | 0 | 0 | 0 | 34 (12.8) |
| Mild NPDR (35) | 0 | 139 | 18 | 0 | 0 | 0 | 0 | 157 (59) |
| Moderate NPDR (43, 47) | 0 | 0 | 57 | 4 | 0 | 0 | 0 | 61 (23) |
| Severe NPDR (53 A to D) | 0 | 0 | 0 | 11 | 0 | 0 | 0 | 11 (4) |
| Very severe NPDR (53 E) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0) |
| Mild PDR (61) | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 (0.8) |
| Moderate PDR (65) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 (0.4) |
| Total (%) | 16 (6) | 157 (59) | 75 (28.2) | 15 (5.6) | 0 (0) | 2 (0.8) | 1 (0.4) | 266 |
Notes: Unweighted κ=0.74±0.04 (95% CI: 0.67–0.81), weighted κ=0.80±0.03 (95% CI: 0.74–0.86).
Abbreviations: CI, confidence interval; DR, diabetic retinopathy; UWFSLO, ultrawide field scanning laser ophthalmoscope; ETDRS, Early Treatment Diabetic Retinopathy Study; ICDR, International Clinical Diabetic Retinopathy; NPDR, nonproliferative diabetic retinopathy; PDR, proliferative diabetic retinopathy.