Table 2.
Baseline characteristics of the dataset used in AntiPORT derivation and validation
| Columns by RBC transfusion | No RBC | RBC | Total | P |
|---|---|---|---|---|
| Total number of patients | 20 358 (67.0%) | 10 030 (33.0%) | 30 388 (100.0%) | |
| Age (years), median (IQR) | 66 (57-73) | 69 (60-76) | 67 (58-74) | < 0.001 |
| Sex | ||||
| Male | 16 247 (79.8%) | 6427 (64.1%) | 22 674 (74.6%) | |
| Female | 4111 (20.2%) | 3603 (35.9%) | 7714 (25.4%) | < 0.001 |
| Procedure type | ||||
| CABG | 10 991 (54.0%) | 4367 (43.5%) | 15 358 (50.5%) | |
| Valve surgery | 4769 (23.4%) | 1948 (19.4%) | 6717 (22.1%) | |
| Combined CABG/valve | 1445 (7.1%) | 1384 (13.8%) | 2829 (9.3%) | |
| Other | 3153 (15.5%) | 2331 (23.2%) | 5482 (18.0%) | < 0.001 |
| Preoperative haemoglobin (g/L) | 142 (19%) | 126 (29%) | 138 (24%) | < 0.001 |
| Preoperative creatinine (μmol/L), median (IQR) | 84 (72-99) | 89 (73-115) | 85 (72-103) | < 0.001 |
| Diabetes | ||||
| No diabetes | 14 605 (71.8%) | 6680 (66.6%) | 21 285 (70.1%) | |
| Diabetes | 5731 (28.2%) | 3343 (33.4%) | 9074 (29.9%) | < 0.001 |
| Hypertension | ||||
| No hypertension | 6064 (29.8%) | 2689 (26.8%) | 8753 (28.8%) | |
| Hypertension | 14 272 (70.2%) | 7332 (73.2%) | 21 604 (71.2%) | < 0.001 |
| NYHA status | ||||
| 1 | 8740 (43.0%) | 3489 (34.8%) | 12 229 (40.3%) | |
| 2 | 7702 (37.9%) | 3515 (35.1 %) | 11 217 (36.9%) | |
| 3 | 3306 (16.3%) | 2217 (22.1 %) | 5523 (18.2%) | |
| 4 | 596 (2.9%) | 803 (8.0%) | 1399 (4.6%) | < 0.001 |
| Estimated ejection fraction | ||||
| Normal | 10 173 (50.8%) | 4779 (48.8%) | 14 952 (50.2%) | |
| 45-60% | 6862 (34.3%) | 2844 (29.1%) | 9706 (32.6%) | |
| 30-45% | 2368 (1 1.8%) | 1453 (14.8%) | 3821 (12.8%) | |
| < 30% | 604 (3.0%) | 710 (7.3%) | 1314 (4.4%) | < 0.001 |
| BMI (kg/m2), median (IQR) | 29 (25-32) | 27 (24-31) | 28 (25-32) | < 0.001 |
| Urgency | ||||
| Non-urgent | 14 969 (73.5%) | 5872 (58.6%) | 20 841 (68.6%) | |
| Urgent | 4907 (24.1%) | 3245 (32.4%) | 8152 (26.8%) | |
| Emergency | 468 (2.3%) | 860 (8.6%) | 1328 (4.4%) | |
| Salvage | 12 (0.1%) | 51 (0.5%) | 63 (0.2%) | < 0.001 |
| Previous cardiac surgery | ||||
| No | 19 368 (95.2%) | 8862 (88.4%) | 28 230 (92.9%) | |
| Yes | 985 (4.8%) | 1163 (11.6%) | 2148 (7.1%) | < 0.001 |
| Perfusion time, median (IQR) | 91 (70-119) | 1 12 (82-157) | 97 (73-130) | < 0.001 |
| Mortality | ||||
| Survived | 20 262 (99.5%) | 9504 (94.8%) | 29 766 (98.0%) | |
| Died | 96 (0.5%) | 526 (5.2%) | 622 (2.0%) | < 0.001 |
BMI = body mass index; CABG = coronary artery bypass grafting; IQR = interquartile range; NYHA = New York Heart Association; RBC = red blood cell.