NPPB and anemia: By contrast, the blood urea nitrogen [6.30 (5.02, 8.45) vs. 6.07 (4.89, 7.47), P = 0.011] and pro-brain natriuretic peptides [3,154.00 (1,310.75, 6,608.00) vs. 1,325.00 (447.28, 2,673.00), P < 0.001] were higher in the PH group, with longer in-hospital stay (5.85 vs. 4.25, P < 0.001) and more anemia patients (20.2% vs. 11.5%, P = 0.007).