Table 1.
Diabetic Retinopathy Severity Levels and Distribution Among Patients.
| Diabetic retinopathy severity level | Distribution (%) | Lesions |
|---|---|---|
| Absent | 62.7 | No alterations |
| Mild NPDR | 11.0 | At least one hemorrhage or microaneurysm |
| Moderate NPDR | 10.0 | Four or more hemorrhages in only one hemi-field a |
| Severe NPDR | 5.1 | Any of the following: |
| - Four or more hemorrhages in the superior and inferior hemi-fields | ||
| - Venous beading | ||
| - Intraretinal microvascular abnormalities (IRMA) | ||
| Proliferative diabetic retinopathy | 10.6 | Any of the following: |
| - Active neovessels | ||
| - Vitreous hemorrhage |
Abbreviation: NPDR, non-proliferative diabetic retinopathy.
a
Superior and inferior hemi-fields separated by the line passing through the center of the macula and the optic disc.