MPO and triple-A syndrome: Importantly, the difference in the combined MPO/D-dimer score was statistically significant when comparing the AAA groups and healthy controls (p < 0.001) as well as both AAA1 and AAA2 vs. PAD: median score 1.26 (IQR 3.95) and 1.07 (IQR 2.69) vs. −0.19 (IQR 1.44, PAD), p < 0.001 and p = 0.014, respectively (Table 2, Figure 1C).