When stratified by NT-proBNP, the average age for HF patients with NT-proBNP ranging from 0–499 pg/mL was 67.71 ± 10.35 n = 14, and the average age for HF individuals with NT-proBNP levels greater than 500 pg/mL was 67.64 ± 9.52 n = 11(Table 3, p = 0.40 ANOVA). This evidence concerns the gene NPPB and hydrops fetalis.