Fig. 1

Flowchart of patients’ enrollment. There were 2153 trauma cases from April 1, 2015, to August 31, 2020. A total of 2016 patients met the following exclusion criteria:1) 16 patients received therapeutic anticoagulants for VTE, 2) 236 patients died before or during prophylactic anticoagulation, 3) 1756 patients initially received other prophylactic anticoagulants except for four prophylactic anticoagulants (heparin calcium, enoxaparin, fondaparinux, and edoxaban), and 4) eight patients discontinued the treatment due to changes in their condition after prophylactic anticoagulation therapy; therefore, 137 patients met the inclusion criteria. In addition, from the 137 patients who met the inclusion criteria, we further excluded patients who received prophylactic anticoagulation therapy for < 7 days (n  = 10) and those with missing data (n  = 33). Finally, 94 patients were enrolled in this study, with 70 and 24 patients assigned to the non-BRSS and BRSS groups, respectively