| Risk factors | Number | Percentage % |
| Surgery | 03 | 12.5 |
| Previous VTE | 03 | 12.5 |
| Cardiopathy | 01 | 4.16 |
| Gyneco-obstetrical factors | 04 | 16.6 |
| Cancer | 01 | 4.16 |
| Immobilization | 03 | 12.5 |
| Obesity | 03 | 12.5 |
| Diabetes | 01 | 4.16 |
| Hypertension | 05 | 20.83 |
| Smoking | 04 | 16.6 |