Objective To evaluate common carotid arterial structure and function in healthy adults by quality intimamedia thickness（QIMT）and quantitative artery stiffness（QAS）.Methods A total of 360 subjects were divided into 3 groups according to age: young group（20～39 years old）

middle-age group（>39～59 years old）and aged group（>59～79 years old）

120 subjects in each group. The bilateral common carotids arterial intima-media thickness（IMT）and the elasticity parameters were respectively measured by QIMT and QAS. The distention coefficient（DC）

the compliance coefficient（CC）

the stiffness parameter（α

β）and the pulse wave velocity（PWV）were analyzed. General information and laboratory biochemical indicators were obtained

including fasting blood glucose（FBG）

serum total cholesterol（TC）

triglyceride（TG）

high-density lipoprotein（HDL-C）and low-density lipoprotein（LDL-C）. The results of parameters among bilateral carotids

different genders and different ages were compared.Results （1）There were no statistically significant differences in the IMT

DC

CC

α

β and PWV of bilateral common carotids.（2） The DC of male was higher than that of female

and there were statistically significant differences（P<0.05）.（3） The IMT was increased with DC values decreasing from young group to middle-age group and aged group. Compared with young group

the CC was decreased with the α

β and PWV values increasing in middle-age group and aged group（all P<0.05）.Correlation analysis showed that IMT was positively correlated with LDL（r=0.396

P<0.05）.DC was correlated with HDL and LDL（r=0.452

-0.354

all P<0.05）.CC was correlated with age

HDL and LDL（r=-0.378

0.422

-0.382

all P<0.05）

PWV was correlated with HDL and LDL（r=-0.467

0.353

all P<0.05）.Conclusion Age and gender have influences in structure and function of common carotid artery in healthy adults.