Caucasian subjects with T2DM without cardiac symptoms who were enrolled in the Asker and Baerum Cardiovascular Diabetes (ABCD) study in 2002-2004 [12] and still alive, were eligible for participation in this 7-year cross-sectional follow-up study (ABCD-2). Classification of subjects as being asymptomatic was based on patient history and clinical assessment (i.e., free from cardio-pulmonary symptoms) [13]. In addition to T2DM, diagnosed in accordance with diagnostic criteria by the World Health Organization [14], the inclusion criteria in the ABCD-study were age 18-75 years and at least one additional CV risk factor (hypertension [treated or 24 h systolic/diastolic blood pressure ≥140/90 mmHg], dyslipidaemia [treated or total cholesterol ≥ 5.0 mmol/L, HDL-cholesterol ≤1.0 mmol/L in men, or ≤1.1 mmol/L in women or triglycerides ≥2.0 mmol/L], past or prior smoking, premature CAD in 1st degree family [male < 55 years, female < 65 years], or microalbuminuria). Exclusion criteria in this imaging follow-up study were irregular heart rate, pregnancy, known allergy to iodinated contrast medium and elevated serum creatinine (female > 120 μmol/L, male > 130 μmol/L).The study complied with the Declaration of Helsinki and was approved by the Regional Committee for Medical and Health Research Ethics. All participating patients gave written informed consent.
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