ADAMTS13 and VWF in male control and MI patients. Frequency distribution of ADAMTS13 (A) and VWF (B) levels in plasma of MI patients (▪) and control subjects (⊡). Data are presented as percentage of total plasma samples measured. Graphs do not show outlying samples more than 200% for (A) or 300% for (B). Association between plasma levels of ADAMTS13 and VWF in (Ci) control and (Di) MI patients. The association between these proteins in the normal range (boxed areas) are enlarged (Cii,Dii). The regression line is shown. (E) ADAMTS13 and VWF levels per blood group among control subjects. ADAMTS13 levels were not different between blood groups (ANOVA P = .21). VWF levels in blood groups A, B, and AB were all significantly different from blood group O (ANOVA P < .001).