Table 3

 Yearly incidence of any and referable diabetic retinopathy in participants using insulin treatment and without retinopathy at baseline

Time from last negative screenAny retinopathyReferable retinopathy
Annual incidence Cumulative incidence Annual incidence Cumulative incidence
1 year192.43 (177.70 to 206.50)192.43 (177.70 to 206.50)2.56 (1.13 to 4.70)2.56 (1.13 to 4.70)
2 years128.03 (120.00 to 136.85)320.64 (304.86 to 334.53)5.00 (3.33 to 6.50)7.67 (4.78 to 10.71)
3 years100.19 (92.02 to 109.50)421.62 (403.10 to 437.67)6.84 (4.23 to 9.43)14.48 (9.68 to 18.66)
4 years81.69 (74.32 to 89.49)502.95 (482.26 to 525.51)8.41 (4.40 to 12.90)22.81 (15.20 to 30.30)

Data are incidence (95% confidence interval) per 1000 people. Incidence of background retinopathy is the difference between the incidences of any and referable retinopathy.