| Risk factors | Weight |
---|---|---|
1. | Male gender | 1 |
2. | Use of systemic estrogens (such as contraceptive pills, hormone rings/patches or needles) | 1 |
3. | Presence of malignancy | 1 |
4. | Surgery in the last month | 1 |
5. | Absence of trauma explaining swelling in the calf | 1 |
6. | Expanded veins of the limb | 1 |
7. | Difference in maximal calf size ≥3 cm | 2 |