| Characteristics | Effective | Percentage |
| Mean age | 46.5 |
|
| Men | 9 | 21.4 |
| Women | 33 | 78.6 |
| Overweight | 5 | 12.0 |
| Smoking | 16 | 38.0 |
| High blood pressure (HTA) | 3 | 7.1 |
| Family risk for varicose | 17 | 40.4 |
| Pregnancy | 5 | 12.0 |
| Superficial venous thrombosis | 6 | 14.2 |
| Deep venous thrombosis | 3 | 7.1 |
| CHIVA technique | 1 | 2.3 |