Compared with the group of subjects without asymptomatic CAS, the group of subjects with asymptomatic CAS 1) had more elders, males and current smokers (P < 0.05); 2) was more likely to have hypertension, diabetes mellitus and the use of antihypertensive and antidiabetic drugs (P < 0.05); 3) had higher value of some biomarkers, such as hs-CRP and Hcy (P < 0.01); and 4) had higher Hcy levels (p-value for trend = 0.0001). Here, CRP is linked to diabetes mellitus.