Table 1: Wells score.
Variable |
Points |
Paralysis, paresis or recent immobilization of the lower extremity |
+1 |
Bedridden recent for > 3 days or major surgery within 12 weeks |
+1 |
Active cancer (treatment or palliation > 6 months) |
+1 |
Previously documented DVT |
+1 |
Tenderness along the deep veins |
+1 |
Unilateral swollen leg |
+1 |
Unilateral swollen calf > 3 cm |
+1 |
Unilateral pitting edema |
+1 |
Collateral superficial veins (nonvaricose) |
+1 |
Alternative diagnosis to DVT as likely or more likely |
-2 |
Wells score for DVT where a score of 0 is associated with a low risk of DVT. A score 1-2 is associated with an intermediary risk and a score of ≥ 3 is associated with a high risk of DVT [24].