The CO group showed greater serum insulin (19.9 ± 3,99 versus 10.7 ± 2.9 μU/mL; p = 0.049) and insulin resistance (5.7 ± 1.1 versus 2.7 ± 0.7; p = 0.03) when compared to CO group postoperatively. This evidence concerns the gene INS and Insulin resistance.