Ethnicity as a VTE risk factor 10/07/2016 by Bob Dunn Ethnicity has been added as a risk factor for VTE to the Deep venous thrombosis page. Liao, S, McAnulty, K, Lim, C, et al. Ethnicity as an independent predictive factor for the results of CT pulmonary angiography and ultrasonography of the lower limbs. Internal Medicine Journal 2016:n/a-n/a.