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Table 1: 

Clinical and procedural variables in the 2 patient groups
Group 1 (n = 16)aGroup 2 (n = 16)bPValue
Male/female (No.)11/510/6.78
Age, mean (SD) (yr)66 (8.1)64 (5.5).31
Vascular risk factors (No.)
    Hypertension1512.38
    Diabetes94.14
    Ischemic heart disease441.00
    Hyperlipidemia58.38
    Peripheral vascular disease20.56
    History of stroke64.56
    Smoker (current and ex-)87.78
    Alcohol57.56
Procedure (No.)
    Protection device310.04
  • 


    a In this group, we catheterized the carotid artery with a 7F or 8F catheter manipulated over a 0.035-inch guidewire.
  • 


    b In this group, we catheterized the carotid artery using a coaxial system in which a 7F or 8F catheter was used in conjunction with a 4F or 5F catheter.