According to the univariate analysis, there were statistically significant differences between DVT group and non-DVT group in age (P < 0.001), gender (P = 0.001), number of days between injury and surgery (P = 0.002), number of days between injury and admission (P < 0.001), Caprini score (P < 0.001), combined cranial trauma (P = 0.016), thrombin time (P = 0.034), D-dimer (P = 0.012), albumin level (P < 0.001), Hb level (P = 0.005), and Hct (P = 0.013) (Table 2). The gene discussed is GSTM1; the disease is deep vein thrombosis.