Table V.
Wells score for likelihood estimation of lower extremity deep venous thrombosisa
| Clinical characteristic | Score |
|---|---|
| Active cancer (patient receiving treatment for cancer within previous 6 months or currently receiving palliative treatment) | 1 |
| Paralysis, paresis, or recent casting or immobilization of lower extremities | 1 |
| Recently bedridden for ≥3 days or major surgery within previous 12 weeks requiring general or regional anesthesia | 1 |
| Localized tenderness along distribution of deep venous system | 1 |
| Entire leg swollen | 1 |
| Calf swelling ≥3 cm larger than that on asymptomatic side (measured 10 cm below tibial tuberosity) | 1 |
| Pitting edema confined to symptomatic leg | 1 |
| Previously documented DVT | 1 |
| Collateral nonvaricose superficial veins | 1 |
| Alternative diagnosis at least as clinically likely as DVT | −2b |
DVT, Deep venous thrombosis.
a
Data from Wells PS, Anderson DR, Rodger M, Forgie M, Kearon C, Dreyer J, et al. Evaluation of D-dimer in the diagnosis of suspected deep-vein thrombosis. N Engl J Med 2003; 349:1227-35; and Wells PS, Anderson DR, Bormanis J, Guy F, Mitchell M, Gray L, et al. Value of assessment of pretest probability of deep-vein thrombosis in clinical management. Lancet 1997; 350:1795-8.
b
A score of <2 is considered to indicate a low likelihood of DVT.