Laboratory parameters also reflected such differences; patients with anemia had higher serum creatinine [105 (IQR 79–136) μmol/L vs. 87 (IQR 75–105) μmol/L, p < 0.01], urea—[8.2 (IQR 6.3–10.8) mmol/L vs. 6.7 (IQR 5.4–8.4) mmol/L, p < 0.0], and NT-proBNP levels [1584 (IQR 761–3088) pg/mL vs. 912 (IQR 558–1647) pg/mL, p < 0.01], and their eGFR values [52 (IQR 38–67) mL/min/1.73 m2 vs. 61 (IQR 50–79) mL/min/1.73 m2, p < 0.01] were also lower than in patients with no anemia. Here, NPPB is linked to anemia (phenotype).