Propensity matched cohort
In order to contextualise outcomes for patients experiencing a postoperative stroke, propensity matching was utilised to identify a matched cohort of patients. Comparison of demographic parameters is presented in Table 3. On univariate analysis, there were some differences between the two groups. Patients experiencing stroke tended to have undergone more urgent or emergent procedures (p<0.01), had a higher preoperative creatinine level (p=<0.01), were in a higher NYHA class preoperatively (p=0.01) and were more likely to have had a previous TIA (p=0.04).