Incidence of diabetic retinopathy in people with type 2 diabetes mellitus attending the Diabetic Retinopathy Screening Service for Wales: retrospective analysis

In the online version of this paper (BMJ 2012;344:e874, doi:10.1136/bmj.e874) by Rebecca L Thomas and colleagues, the last sentence in the Results section should have been: “For participants with a duration of diabetes of 10 years or more, the use of insulin treatment increased cumulative incidence greatly (without insulin treatment 2.24, 5.86, and 10.33 per 1000 people; with insulin treatment 9.61, 17.10, and 24.26 per 1000 people).”