Abstract T P156: Chronic Kidney Disease as a Risk Factor for Carotid Atherosclerosis : A Case Control Study

Background: Chronic kidney disease (CKD) increases risk of cardiovascular diseases, which might be mediated by facilitation of atherosclerosis. However, impact of CKD on progression of atherosclerosis has not been fully evaluated, and we sought to investigate associations between CKD and extent of carotid atherosclerosis. Methods: Between January 2009 and February 2013, we enrolled a consecutive series of 147 CKD patients and compared the same number of age, sex and vascular risk factor-matched 147 control subjects who visited our hospital during the same period. Carotid atherosclerosis was examined with MR angiography of internal carotid artery (ICA). The degree of stenosis of the internal carotid artery (ICA) in each patient was classified into 5 grades; (1) normal; (2) mild (<50%); (3) moderate (50-69%) ;(4) severe (70-99%); (5) occlusion. Results: Mean age of the subjects was 72.2±8.7 years, and 208 were male (70.7%) among the total of 294 subjects. Significant stenosis of ICA (stenosis more than 50%) was more prevalent in CKD patients [odds ratio (OR) 6.7; 95% confidence interval (CI) 2.2-20.4, p=0.001). The presence of CKD was an independently risk factor for increasing the severity of stenosis of ICA (mild, OR 4.5, 95% CI 2.0-10.2; moderate, OR 3.9, 95% CI 1.3-22.4; severe, OR 12.0, 95% CI 4.3-34.6; occlusion, 14.1, 95% CI 2.1-92.2). Conclusion: In the current case-control study, we found that CKD is associated with incidence of significant carotid stenosis and increases the severity of carotid stenosis. Our results indicate that CKD should be treated as a new risk factor for carotid atherosclerosis.