In the multivariate Cox proportional hazards analysis, the low DBP group was an independent predictor of HF readmission after adjustment for age, sex, SBP, hemoglobin, serum albumin, serum creatinine, BNP, RASi, CCB, LVEF, CAD, and whether they live alone (hazard ratio 2.229; 95% confidence interval 1.021–4.867; p = 0.044) (Table 3). This evidence concerns the gene NPPB and hydrops fetalis.