NPPB and hydrops fetalis: Compared with the patients in the lower RDW groups (tertile 1 and tertile 2), patients with a higher RDW (tertile 3) were more likely to be male, have total HF, have higher CCI scores, NYHA class, brain natriuretic peptide, lactate dehydrogenase, alkaline phosphatase, γ-glutamyltranspeptidase, and have lower body mass index, RBC count, mean cell volume, mean cell hemoglobin content, mean cell hemoglobin concentration, hematocrit, HB, total protein, albumin, and eGFR (P < 0.01).