Wells Score for DVT

Active cancer (treatment ongoing, within 6 months, or palliative)

Paralysis, paresis, or recent cast immobilization of lower extremity

Bedridden >3 days OR major surgery <12 weeks

Tenderness along deep venous system

Entire leg swollen

Calf swelling >3 cm compared to asymptomatic leg (measured 10 cm below tibial tuberosity)

Pitting edema (greater in symptomatic leg)

Collateral superficial veins (non-varicose)

Previously documented DVT

Alternative diagnosis at least as likely as DVT