VEGFA and Venous thrombosis: Analysis of data from these studies show that whilst pre-event plasma VEGF or serum VEGF levels are higher in patients who go on to experience CAT there is no significant difference in VEGF levels between patients who develop thrombosis versus those who do not (mean difference 11.68 pg/mL, 95% CI −2.39–25.73,p = 0.10;Fig. 3).