Crude and adjusted risk of aortic valve reoperation, heart failure admission or death in 3417 patients with porcine aortic bioprostheses according to blood group
| Outcome | Blood group | Crude HR (95 % CI) | Age-adjusted and sex-adjusted HR (95% CI) | Multivariable adjusted HR (95 % CI)* |
| Aortic valve reoperation | A or AB (ref) | 1.00 | 1.00 | 1.00 |
| B or O | 1.06 (0.70 to 1.61) | 1.00 (0.66 to 1.52) | 0.95 (0.62 to 1.45) | |
| Heart failure | A or AB (ref) | 1.00 | 1.00 | 1.00 |
| B or O | 0.91 (0.77 to 1.07) | 0.92 (0.78 to 1.09) | 0.92 (0.77 to 1.08) | |
| All-cause death | A or AB (ref) | 1.00 | 1.00 | 1.00 |
| B or O | 0.98 (0.89 to 1.07) | 0.98 (0.89 to 1.07) | 0.95 (0.87 to 1.05) |
↵*Adjusted for patient age, sex, left ventricular ejection fraction, estimated glomerular filtration rate, atrial fibrillation, hypertension, chronic obstructive pulmonary disease, prior myocardial infarction, prior stroke, hyperlipidaemia, peripheral vascular disease, alcohol dependency, heart failure, diabetes, prior major bleeding event, prior venous thromboembolism and emergent operation.
Ref, reference category .