Oral glucose tolerance test and HbA1c for diagnosis of diabetes in patients undergoing coronary angiography the Silent Diabetes Study

Aims/hypothesis The primary aim of this study was to compare the results of HbA1c measurements with those of an OGTT for early diagnosis of ‘silent diabetes’ in patients with coronary artery disease (CAD) undergoing angiography without prediagnosed diabetes. A secondary aim was to investigate the correlation between the extent of CAD and the glycaemic status of the patient.