We also collected data on intraoperative complications, need for additional procedures, preoperative and 24-hour postoperative Hb and Ht levels, length of hospital stay, and postoperative complications up to the 6th month, the latter of which included transfusions, reoperation for hematoma drainage, arthrofibrosis, wound dehiscence, superficial and deep infection, deep vein thrombosis (DVT), pulmonary embolism (PE), myocardial infarction, and death. The gene discussed is GSTM1; the disease is deep vein thrombosis.