Internal validation of the competing risk model
| HR | 95% CI | |
| Age | 1.0 | 1.0 to 1.1 |
| Age’ | 0.9 | 0.8 to 1.0 |
| Age’’ | 1.4 | 0.8 to 2.5 |
| Sex | 0.9 | 0.7 to 1.3 |
| Anaemia | 1.0 | 0.7 to 1.4 |
| Renal insufficiency | 1.1 | 0.7 to 1.6 |
| Antiplatelet use | 1.5 | 0.9 to 2.5 |
| History of hypertension | 1.1 | 0.9 to 1.5 |
| History of bleeding | 1.5 | 1.1 to 2.0 |
| C-statistic | 0.61 | 0.54 to 0.70 |
| R2 | 0.018 | |
| Brier score | 0.13 | 0.12 to 0.15 |
A cubic spline with four knots was used to account for non-linearity of the variable age. The variable age is, therefore, divided into three groups depicted as age, age’ and age’’.