Table 1. Frequency and Distribution of Clinical Characteristics in the Subject Population.

Five patients were taking both an antiplatelet drug and warfarin. All of these clinical characteristics were evenly distributed (Chi-square or Fisher’s Exact test) between both groups, except aspirin rx (P<.03). A multivariate analysis of PBS values, looking at covariables of aspirin therapy, diabetes, and smoking were not significant, and had no interactions with the factor of stenosis.

Clinical Characteristic	Stenosis n=18	No Stenosis n=18	All Patients n=36
Mean Age (range)	65.5 (41–84)	68.7 (55–90)	67.1 (41–90)
Female Gender	6 (33%)	3 (17%)	9 (25%)
Diabetic	7 (39%)	6 (33%)	13 (36%)
Statin Rx	13 (72%)	15 (83%)	28 (78%)
Warfarin Rx	9 (50%)	3 (17%)	12 (33%)
Aspirin Rx	9 (50%)	16 (89%)	25 (69%)
Clopidogrel Rx	3 (17%)	1 (6%)	4 (11%)
Active Smoker	9 (50%)	10 (56%)	19 (53%)

Rx denotes “therapy”, and percentages are rounded.