A

General Anaesthesia Risk Factor p-value 95% CI for mean (total) Smoking 0.858 0.39-0.64 Insulin 0.035 0.19-0.35 Steroids (IV) 0.308 0.24-0.40 Beta blockers 0.752 0.69-0.84 Metoclopramide 0.736 0.46-0.64 Serotonin inhibitors 0.81 0.57-0.74

B

Regional Anaesthesia/Monitored Anaesthesia Care Risk Factor p-value 95% CI for mean (total) Smoking 0.666 0.44-0.75 Insulin 0.248 0.16-0.46 Steroids (IV) 0.064 0 .03-0.25 Beta blockers 0.671 0.32-0.63 Metoclopramide 0.395 0.37-0.68 Serotonin inhibitors 0.787 0.07-0.31 All data were analyzed by ANOVA

Table 5: Pharmacologic risk factors for QTc prolongation.