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Table 1 Wells Score for Clinical Risk Deep Vein Thrombosis

From: Vena cava inferior thrombosis detected by venous hum: a case report

Active cancer (1 point)
Paralysis, paresis, or recent plaster immobilization of the lower extremity (1 point)
Recently bedridden for more than three days or major surgery within four weeks (1 point)
Localized tenderness along the distribution of the deep venous system (1 point)
Entire leg swollen (1 point)
Calf swelling by more than 3 cm when compared with the asymptomatic leg (1 point)
Pitting edema -greater in the symptomatic leg (1 point)
Collateral superficial veins-non-varicose (1 point)
Alternative diagnosis as likely or more possible than that of DVT (-2 points)