Purpose: One of the risk factors of atherosclerosis is homocysteinemia. We evaluated the association between various risk factors of atherosclerosis including homocysteine(tHcy)and the maximum thickness of the intima-media complex (MaxIMT) measured by carotid ultrasonography using logistic analysis (LogR) and simple regression analysis (SR). Methods: The subjects were 614 non-smokers (338 males,52.8± 10.4 years; 276 females,54.3± 9.4 years) who underwent brain dock at the Kantoh Rousai Hospital Medical Screening Center between August 1,2001 and March 31,2005, had no history of cerebrovascular disease, coronary disease, hypertension, hyperlipidemia, diabetes mellitus, or obstructive atherosclerosis, and were neither receiving treatment on an outpatient basis nor using vitamins. MaxIMT, tHcy, age, systolic blood pressure, diastolic blood pressure (DBP), total cholesterol(C), LDL-C, HDL-C, triglycerides, fastening blood sugar, HbA1c, body mass index and lipoprotein(a) were analyzed. Results: LogR using MaxIMT as a criterion variable and the other items as explanatory variables showed age (p< 0.0001), DBP(p< 0.007), and tHcy (p< 0.016) as significant variables (p< 0.05). SR between tHcy and the other variables showed no correlation. Conclusion: tHcy is a risk factor of atherosclerosis that is independent of the other factors evaluated in this study. There is a possibility that tHcy at the upper limit of the standard concentration or the maintenance of a slightly high tHcy concentration induces progression of atherosclerosis. When risk factors of atherosclerosis are evaluated, tHcy should also be measured.
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