Predisposing risk factors for pulmonary embolism
| Risk factor | Transient | Permanent |
| Strong | ||
| Fracture, major trauma | + | |
| Hip or knee replacement | + | |
| Major general surgery | + | |
| Spinal cord injury | + | |
| Moderate | ||
| Active cancer | + | |
| Hormone replacement therapy | + | |
| Oral contraceptive therapy | + | |
| Pregnancy/post-partum | + | |
| Previous venous thromboembolism | + | |
| Inherited thrombophilia | + | |
| Weak | ||
| Bed rest >3 days | + | |
| Prolonged air travel | + | |
| Age | + |
+: indicates that the risk factor is transient or present. Adapted from [4].