ABSTRACT
The location of the initial DVT has an impact on the incidence of recurrence. Thus, the presence of iliofemoral vein thrombosis has a rate of recurrent VTE of 11.8%, compared with 5.1% for popliteal vein thrombosis.7 In the report by Breddin et al,8 there was a high correlation between venographic results as measured by the Marder9 score and
No. of risk factors Risk factor Percentage (mean + SD)
Age > 40 years 59.1 2.1 + 1.0 Obesity 27.6 2.4 + 1.0 Major surgery 22.8 2.3 + 1.1 Prolonged immobilization 14.2 3.0 + 1.1 Cancer 9.3 2.8 + 1.0 Congestive heart failure 7.8 2.8 + 0.9 Myocardial infarction 2.9 3.3 + 0.9 Fracture (hip or leg) 2.2 3.7 + 1.3 History of venous thromboembolism 1.8 3.0 + 1.0 Trauma 1.6 2.1 + 1.5 Stroke 1.5 3.3 + 1.3 Estrogen-replacement therapy 0.4 2.0 + 0.8
recurrence of the DVT. Of the 490 patients classified as having no response on venography, 34% had recurrent VTE, whereas only 5 (1.05%) of 476 patients classified as having a response had such a recurrent event.
