Site-specific progression of carotid artery intimal-medial thickness

• Published in: Atherosclerosis Vol. 171; no. 1; pp. 137 - 143
• Main Authors: Espeland, Mark A., Evans, Greg W., Wagenknecht, Lynne E., O’Leary, Daniel H., Zaccaro, Daniel J., Crouse, J.Robin, Howard, George, Haffner, Steven M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ireland Ltd 01.11.2003; Elsevier
• Subjects: Atherosclerosis; Atherosclerosis (general aspects, experimental research); Biological and medical sciences; Blood and lymphatic vessels; Cardiology. Vascular system; Carotid Artery Diseases - diagnostic imaging; Carotid Artery Diseases - pathology; Carotid Artery Diseases - physiopathology; Carotid Artery, Common - diagnostic imaging; Carotid Artery, Common - pathology; Cohort Studies; Cross-Sectional Studies; Diabetes; Diabetes Mellitus - diagnostic imaging; Diabetes Mellitus - pathology; Diabetes Mellitus - physiopathology; Disease Progression; Female; Follow-Up Studies; Glucose Tolerance Test; Humans; Insulin Resistance - physiology; Male; Measurement error; Medical sciences; Research design; Sex Factors; Statistical models; Statistics as Topic; Tunica Intima - diagnostic imaging; Tunica Intima - pathology; Ultrasonography; Ultrasonography, Interventional; MVN; ACAPS; IMT; Statistical models; IGT; Atherosclerosis; Ultrasonography; IRAS; NGT; Research design; Diabetes; Measurement error; WHO; Sonography; Human; Pancreatic hormone; Cardiovascular disease; Insulin; Artery; Vascular disease; Blood vessel; Carotid; Echography; Circulatory system; Measurement method; Corrections; Comparative study
• ISSN: 0021-9150; 1879-1484
• DOI: 10.1016/j.atherosclerosis.2003.07.009

Purpose: To characterize the intercorrelation of changes in intimal-medial thickness (IMT) among carotid artery sites and examine the influence of diabetes and sex on these correlations. Methods: Ultrasonographic IMT measurements from the near and far walls of common and internal segments in the arteries of 1207 participants of the Insulin Resistance Atherosclerosis Study (IRAS) were analyzed to estimate the underlying correlations of IMT changes (average of 5.2 years) among artery sites after correction for measurement error. Results: Differences in IMT progression associated with diabetes and sex were evident at all sites. IMT changes were strongly correlated between left and right arteries ( r=0.32–0.73) and near and far walls ( r=0.42–0.87). Correlations of IMT changes at corresponding sites of internal versus common segments were reduced from r=0.32 among normal individuals to r=0.09 among those with diabetes, but were similar for women and men. Conclusions: IMT progression is a diffuse process involving all carotid artery sites. Diabetes does not influence the bilateral and radial nature of progression, but reduces the correlation between distal sites within an artery. Pooling measurements across arteries and walls often yields the most efficient analyses.