Furthermore, in the high-LDU group, anemia was more common (67.4% vs. 43.8%; p = 0.019), as was qualitatively elevated NT-proBNP (≥median of 3952 pg/mL: 60.4% vs. 37.5%; p = 0.024) (Table 2, Figure 1). Here, NPPB is linked to anemia (phenotype).