A highly significant trend of increasing thickness is shown with greater numbers of risk factors. Risk factors included were total cholesterol / HDL cholesterol ratio, waist circumference, systolic blood pressure, insulin level (75th percentile specific for age, race, gender) and smoking.
p for trend = 0.003 for femoral; p for trend = 0.001 for CCA, bulb, ICA and composite carotid
CCA, common carotid artery; Bulb, carotid bulb; ICA, internal carotid artery; Com, composite carotid.