GSTM1 and Hypertension: Among the HBL (−) and HBL (+) group, there were statistically significant differences in age (p < 0.001), hypertension (p < 0.001), history of smoking (p < 0.001), diabetes (p = 0.017), duration from admission to surgery (p = 0.021), length of surgical incision (p < 0.001), duration of operation (p < 0.001), P1% (p < 0.001), P2% (p < 0.001), preoperative total cholesterol (p < 0.001), preoperative triglyceride (p < 0.001), preoperative Hb (p = 0.017), preoperative PT (p < 0.001), preoperative Fib (p = 0.038), and preoperative APTT (p < 0.001).