HR for long-term mortality in the multivariable regression model
| Variable | HR (95% CI) | P value |
| PHF with NT-proBNP POD1 ≥5290 ng/L | 6.20 (2.72 to 14.1) | <0.0001 |
| NT-proBNP PREOP ≥825 ng/L | 2.80 (1.48 to 5.29) | 0.002 |
| Age (years) | 1.07 (1.02 to 1.11) | 0.002 |
| Diabetes mellitus | 2.42 (1.22 to 4.80) | 0.011 |
NT-proBNP, N-terminal pro-B-type natriuretic peptide; PHF, postoperative heart failure; POD1, first postoperative day;PREOP, the day before index procedure.