Table 4. Comparison of recurrence rate and mortality of HF between BNP and observation groups.
| Group | CasesN | Recurrence rate of HF | Mortalityof HF |
| Cases (%) | Cases (%) | ||
| Observation group | 92 | 22 (23.91) | 5 (5.43) |
| BNP group | 94 | 25 (26.60) | 6 (6.38) |
| x2 value | 0.18 | 0.08 | |
| p value | 0.67 | 0.78 | |
| Ischemic (subgroup) | |||
| Observation group | 54 | 13 | 3 |
| BNP group | 58 | 16 | 3 |
| x2 value | 0.18 | 0.008 | |
| p value | 0.67 | 0.93 |
Values are expressed as a percentage of recurrence and mortality of the two groups. p < 0.05 was considered statistically significant.
BNP, brain natriuretic peptide; HF, heart failure.