Table 1 Clinical model for predicting the pretest probability score of deep vein thrombosis (adapted from Wells et al. [1])
Clinical characteristics | Score |
|---|---|
Active cancer (patient receiving treatment for cancer within the previous 6 months or currently receiving palliative treatment) | 1 |
Paralysis, paresis, or recent plaster immobilization of the lower extremities | 1 |
Recently bedridden for ≥3 days or major surgery within the previous 12 weeks requiring general or regional anesthesia | 1 |
Localized tenderness along the distribution of the deep venous system | 1 |
Entire leg swollen | 1 |
Calf swelling at least 3 cm larger than that on the asymptomatic side (measured 10 cm below the tibial tuberosity) | 1 |
Pitting edema confined to the symptomatic leg | 1 |
Collateral superficial veins (nonvaricose) | 1 |
Previously documented deep vein thrombosis | 1 |
Alternative diagnosis at least as likely as deep vein thrombosis | −2 |