Hansson et al identified risk factors for a patient having a recurrent deep vein thrombosis (DVT). This can help identify a patient who may benefit from more aggressive management. The authors are from the University Hospital Ostra in Goteborg, Sweden.


The cumulative incidence of recurrent venous thromboembolism at 5 years was 22% after a first VTE and 28% after a second.


Risk factors associated with a higher rate of recurrent deep vein thrombosis:

(1) proximal extension of the deep vein thrombosis

(2) presence of cancer

(3) short duration of anticoagulation therapy (<= 6 months)

(4) history of a previous thromboembolic event


Factors associated with a lower rate of recurrent deep vein thrombosis:

(1) thrombosis occurring after surgery

(2) longer duration of anticoagulation therapy (> 12 months)



• The method acknowledges a history of previous deep vein thrombosis, but the risk of recurrence would seem to be higher if there have been multiple previous episodes.

• The model does not include mention of a hereditary hypercoagulable state which would benefit from lifelong prophylaxis.


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