The presented studies were conducted within the framework of the international ADDITION study (Anglo-Danish-Dutch Study of Intensive Treatment in People with Screen-Detected Diabetes in Primary Care), a randomised controlled trial in 3,057 screen-detected type 2 diabetic patients. The aim of ADDITION is to evaluate whether screening for type 2 diabetes in general practice is feasible and subsequent intensified, multifactorial treatment beneficial. Intensified treatment consisted of pharmacological treatment combined with lifestyle education.