Table 2.
Baseline characteristics
| Test cohort (n = 462) | Validation cohort (n = 499) | p-value | |
|---|---|---|---|
| ICU length of stay in days (continuous): median (P25-P75) | 1.9 (1.2-3.6) | 2.0 (1.2-3.9) | 0.277 |
| ICU length of stay in days (discrete): median (P25-P75) | 3 (2-5) | 3 (2-5) | 0.360 |
| Patients discharged on the day after surgery: n (%) | 147 (31.8) | 149 (29.9) | 0.511 |
| ICU mortality: n (%) | 8 (1.7) | 11 (2.2) | 0.599 |
| Hospital mortality: n (%) | 15 (3.2) | 16 (3.2) | 0.972 |
| EuroSCORE (additive): median (P25-P75) | 5 (3-7) | 5 (3-7) | 0.202 |
| EuroSCORE (logistic)%: median (P25-P75) | 3.9 (2.1-7.4) | 4.5 (2.2-8.1) | 0.828 |
| Type of surgery | |||
| Isolated OPCAB: n (%) | 190 (41.1) | 179 (35.9) | 0.094 |
| Isolated on-pump CAB: n (%) | 1 (0.2) | 0 (0) | 0.298 |
| Valvular surgery (single, multiple and/or combined with CAB or other surgery): n (%) | 250 (54.1) | 298 (59.7) | 0.079 |
| Other cardiac surgery (congenital, aorta ascendens, myxoma ...): n (%) | 21 (4.6) | 22 (4.4) | 0.919 |
| Repeat cardiac surgery: n (%) | 27 (5.8) | 49 (9.8) | 0.023 |
| Surgery post-endocarditis: n (%) | 7 (1.5) | 7 (1.4) | 0.885 |