Severity of diabetic retinopathy for people in the study population according to Early Treatment Diabetic Retinopathy Study Scale (Diabetes Control and Complications Trial5)
| Step | Level (worse eye/better eye) | Number of people | % of diabetic people (n=113) |
| 1 | 10/10 | 86 | 76 |
| 2 | 20/<20 | 1 | 1 |
| 3 | 20/20 | 10 | 9 |
| 4 | 35/<35 | 2 | 2 |
| 5 | 35/35 | 6 | 5 |
| 6 | 43/<43 | 1 | 1 |
| 7 | 43/43 | 0 | 0 |
| 8 | 47/<47 | 0 | 0 |
| 9 | 47/47 | 0 | 0 |
| 10 | 53/<53 | 2 | 2 |
| 11 | 53/53 | 0 | 0 |
| 12 | ≥61/<61 | 2 | 2 |
| Not known (non-cooperative/dense cataract) | 3 |
3 | |