| Variable | Frequency (%) |
| Medical risk factors |
|
| Hypertension | 29 (37.2) |
| Previous VTE | 9 (11.5) |
| Autoimmune disease | 1 (1.3) |
| Cancer | 5 (11.5) |
| Pulmonary tuberculosis | 3 (3.8) |
| Cardiovascular disease | 10 (12.8) |
| HIV infection | 11 (14.1) |
| Dyslipidemia | 3 (3.8) |
| Central venous catheterization | 4 (5.1) |
| Others | 15 (19.2) |
| Recent surgical intervention |
|
| Gynecology/obstetrical | 4 (5.1) |
| Obstetrical |
|
| Pregnancy | 1 (1.3) |
| Puerperium | 2 (2.6) |
| Abortion | 1 (1.3) |
| Social risk factors |
|
| Exogenous hormones | 1 (1.3) |
| Immobility | 16 (20.5) |
| Smoking/toxicomania | 8 (10.3) |
| Obesity | 35 (44.9) |
| Long-haul travel (≥4 hours) | 14 (17.9) |
| Family history of VTE | 3 (3.8) |