['Diabetes mellitus (DM) is a major risk factor for cardiovascular events. The study purpose was to compare DM and non-DM (nDM) patients in terms of statin-induced change of plaque characteristics using intravascular ultrasound (IVUS) and coronary angioscopy.', 'Patients with coronary artery disease and hypercholesterolemia who were enrolled to the TWINS were selected and classified into two groups: DM group and nDM group. Eleven DM patients and 28 nDM patients were studied.', 'Low-density lipoprotein cholesterol levels decreased significantly to a similar extent at weeks 28 and 80 from baseline in DM and nDM (p<0.001). The mean angioscopic color grades of yellow plaques in DM and nDM were similar at baseline and significantly decreased at week 80 from baseline in both groups, however, the mean change of angioscopic color grade from baseline in DM were not significantly decreased and the mean angioscopic color was significantly higher than that in nDM (1.34 vs. 1.00, p<0.05) at week 28. IVUS showed plaque volume reduction in both groups (p<0.01) except at week 80 in DM group, which was not statistically significant different compared to the baseline.'] Is plaque stabilization by intensive LDL-cholesterol lowering therapy with atorvastatin delayed in type 2 diabetic patients with coronary artery disease-Serial angioscopic and intravascular ultrasound analysis?