Abstract
We studied the glycaemic threshold and prevalence of diabetic retinopathy in screen-detected diabetes in Saudi Arabia, Algeria and Portugal. The prevalence of diabetes-specific retinopathy started to increase at an HbA(1c) level of 6-6.4% (42-47 mmol/mol) and in individuals with HbA(1c) > 7.0% the prevalence was 6.0%. (C) 2014 Elsevier Ireland Ltd. All rights reserved.