Baseline characteristics and risk factors.

cTFC = corrected TIMI frame count; HS educ = High School education; BMI = body mass index; Hx = history; HRT = hormone replacement therapy; CAD = coronary artery disease.*Because of skewed distribution, medians [interquartile ranges] are given and Log transformations were used to estimate the age-adjusted p-values.**For frequencies, where there were missing values, the statistic given is: no. with the condition/no. available (%).