Patient-specific risk factors | Â |
 Active rheumatic disease |  |
 History of VTEa |  |
 Active cancer |  |
 Estrogen |  |
 Active cancer |  |
 Smoking |  |
 Advanced age |  |
 Black race (Asian race protective) |  |
 Obesity |  |
 Non-O ABO blood group |  |
 Thrombophilia |  |
Surgery-specific risk factors | Â |
 Orthopedic surgery > other surgery |  |
 Hip fracture |  |
 Bilateral arthroplasty |  |
 Revision arthroplasty |  |
 General > Axial/regional anesthesia |  |