There was no independent association of postoperative BChE activity and a history of stroke (B = -204.250 (95% CI: -438.515 to 30.016), p = 0.087), type 2 diabetes mellitus (B = 112.241 (95%CI = -53.025 to 277.507), p = 0.182), nor with intraoperative lactate values (B = -1.929 (95%CI -61.570 to 57.712), p = 0.949). The gene discussed is BCHE; the disease is diabetes mellitus.