Active cancer (treatment ongoing, within previous 6 months or palliative) | 1 |
Paralysis, paresis, or recent plaster immobilization of the lower extremities | 1 |
Recently bedridden >3 days or major surgery within 12 weeks requiring general or regional anesthesia | 1 |
Localized tenderness along the distribution of the deep venous system Entire leg swollen | 1 |
Calf swelling 3 cm larger than asymptomatic side (measured 10 cm below tibial tuberosity) | 1 |
Pitting edema confined to the symptomatic leg | 1 |
Collateral superficial veins (nonvaricose) | 1 |
Alternative diagnosis at least as likely as deep venous thrombosis | −2 |