Previous history of DVT or PE, metastatic malignancy, venous disease, tobacco use, and hormonal therapy (estrogen) have also been associated with an increased risk of venous thromboembolism in ...

[2] The clinical diagnosis of deep vein thrombosis is very difficult to ... replacement patients (508 hips and 518 knees) on warfarin prophylaxis (average 9 days) to duplex ultrasound compression ...