Table 4.
Probability of referable disease and referable background retinopathy or proliferative retinopathy at screening intervals of 1 or 2 years, by sex, diabetes duration and current retinopathy grade in those with type 2 diabetes
| Current grading | Type 2 diabetes duration (years) | Men | Women | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Probability of any referable disease (%) | Probability of referable retinopathy (%) | Probability of any referable disease (%) | Probability of referable retinopathy (%) | ||||||
| 1 year interval | 2 year interval | 1 year interval | 2 year interval | 1 year interval | 2 year interval | 1 year interval | 2 year interval | ||
| No visible retinopathy | 0 | 0.15 | 0.40 | 0.03 | 0.07 | 0.15 | 0.37 | 0.03 | 0.06 |
| 5 | 0.21 | 0.67 | 0.04 | 0.11 | 0.24 | 0.70 | 0.04 | 0.12 | |
| 10 | 0.27 | 0.91 | 0.05 | 0.16 | 0.31 | 1.03 | 0.05 | 0.18 | |
| 15 | 0.30 | 1.10 | 0.05 | 0.19 | 0.37 | 1.31 | 0.06 | 0.22 | |
| Mild background retinopathy | 0 | 2.79 | 4.43 | 0.47 | 0.75 | 2.52 | 5.59 | 0.43 | 0.63 |
| 5 | 4.08 | 7.41 | 0.69 | 1.26 | 4.06 | 6.96 | 0.69 | 1.19 | |
| 10 | 5.10 | 10.20 | 0.87 | 1.74 | 5.43 | 10.40 | 0.93 | 1.78 | |
| 15 | 5.80 | 12.20 | 0.99 | 2.08 | 6.43 | 13.20 | 1.09 | 2.25 | |
Referable disease: referable maculopathy, referable background retinopathy and proliferative retinopathy; referable retinopathy: referable background retinopathy and proliferative retinopathy