Table 2.
Life Tables Showing Cumulative Yearly Incidence of Development of Grades of Retinopathy and Sight-Threatening Diabetic Retinopathy and of Progression by 2 (or More) and 3 (or More) Steps on the Liverpool Diabetic Eye Study Scale in the Worse Eye of Subjects in the Malawi Diabetic Retinopathy 24-Month Cohort Study and No Retinopathy at Baseline
| T | Any Retinopathy |
Level 30 |
Level 40 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | n | Cumulative Incidence | 95% CI | N | n | Cumulative Incidence | 95% CI | N | n | Cumulative Incidence | 95% CI | |
| 1 | 177 | 18 | 10.8% | 6.1–15.5 | 177 | 6 | 3.6% | 0.8–6.4 | 177 | 0 | 0% | – |
| 2 | 138 | 40 | 38.0% | 30.2–45.8 | 150 | 3 | 5.6% | 1.9–9.3 | 156 | 1 | 0.7% | 0–2.0 |
| T | STDR∗ |
2+ Step Progression |
3+ Step Progression |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | n | Cumulative Incidence | 95% CI | N | n | Cumulative Incidence | 95% CI | N | n | Cumulative Incidence | 95% CI | |
| 1 | 174 | 0 | 0% | – | 177 | 8 | 4.8% | 1.6–8.1 | 177 | 2 | 1.2% | 0–2.9 |
| 2 | 154 | 4 | 2.7% | 0.1–5.3 | 148 | 13 | 13.7% | 8.2–19.3 | 154 | 1 | 1.9% | 0–4.1 |
CI = confidence interval; N = number entering time interval; n = new cases diagnosed during year; STDR = sight-threatening diabetic retinopathy; T = time from recruitment (years).
∗
Patients with STDR at baseline were omitted from analysis.