Plasma biomarker concentrations between study groups. Plasma levels of D-dimer (A), TAT (B), and PF4 (C) were measured by ELISA in patients with fast growing AAAs, slow growing AAAs, SAAs, or controls. A total of 347, 350, and 348 patients were included in the D-dimer, TAT, and PF4 analysis, respectively. *P < .05, **P < .01 (P values from Wilcoxon rank-sum test for all pairwise comparisons; P values are Bonferroni corrected with a factor of 7 equal to the number of pairwise comparisons made for each biomarker).