Association between intraoperative magnesium sulfate infusion and mortality after non-cardiac surgery: a retrospective propensity score matched analysis.

The short-term effects of magnesium sulfate infusion during surgery are well known. However, the long-term outcomes of intraoperative magnesium sulfate infusion remain unknown. Medical records of patients aged ≥20 years who underwent non-cardiac surgical procedures at Seoul National University Bundang Hospital between January, 2010 and October, 2016 were analyzed. After propensity score matching, 12,652 patients were included in the final analysis, 6326 each in the magnesium and non-magnesium groups. There were no significant differences in 30-day or 1-year mortality between subjects [30-day mortality, hazard ratio (HR): 1.31, 95% CI: 0.64-2.69, P = 0.465; 1-year mortality, HR: 1.20, 95%CI: 0.94-1.53, P = 0.136]. Intraoperative magnesium sulfate infusion was not significantly associated with postoperative 30-day or 1-year mortality.