Table 2. Postoperative clinical outcome according to preoperative hs-TnI cut-off value.
| Overall population | hs-TnI < 6.5 ng/L | hs-TnI ≥ 6.5 ng/L | Unadjusted HR | P-value | Adjusted HR* | P-value |
| (n = 262) | (n = 155) | (n = 107) | (95% CI) | (95% CI) | ||
| All-cause death | 1 (0.6%) | 3 (2.8%) | 4.35 (0.45–41.87) | 0.20 | 0.25 (0.02–3.60) | 0.31 |
| Postoperative heart failure | 13 (8.4%) | 31 (29.0%) | 3.84 (2.01–7.34) | < 0.01 | 2.35 (1.15–4.78) | 0.02 |
| Postoperative atrial fibrillation | 5 (3.2%) | 19 (17.8%) | 5.92 (2.21–15.88) | < 0.01 | 5.05 (1.69–15.12) | < 0.01 |
| Postoperative myocardial infarction | 0 (-) | 9 (8.4%) | . | . | . | . |
| Cardiovascular re-hospitalization within 90 days postoperative | 2 (1.3%) | 7 (6.5%) | 5.18 (1.07–24.95) | 0.04 | 2.01 (0.41–12.04) | 0.36 |
| MACE | 17 (11.0%) | 48 (44.9%) | 4.89 (2.81–8.52) | < 0.01 | 3.43 (1.85–6.35) | < 0.01 |
*Adjusted covariates included Age > 80 years old, Renal insufficiency, Prior heart failure, NT-proBNP ≥ 135 pg/dL, use of diuretics and RCRI = 1 or more. CI: confidence interval; HR: hazard ratio; hs-TnI: high sensitive troponin I; MACE: major adverse cardiovascular event; NT-proBNP: N-terminal pro-brain natriuretic peptide; RCRI, revised cardiac risk index.