Table 2.
Predisposing Factors for Venous Thromboembolism17
| Strong predisposing factors (odds ratio > 10) | |
| Fracture (hip or leg) | |
| Major general surgery | |
| Major trauma | |
| Spinal cord injury | |
| Moderate predisposing factors (odds ratio = 2–9) | |
| Arthroscopic knee surgery | |
| Malignancy | |
| Oral contraceptive therapy | |
| Pregnancy/postpartum | |
| Previous venous thromboembolism | |
| Thrombophilia | |
| Weak predisposing factors (odds ratio < 2) | |
| Bed rest > 3 d | |
| Immobility due to sitting (prolonged bus or air travel) | |
| Increasing age | |
| Laparoscopic surgery | |
| Obesity | |
| Pregnancy/antepartum | |
| Varicose veins |