a trend toward significanceP = 0.061
Subanalyses Multiple logistic regression analysis revealed that As-E was an independent predictor of pre-operative acute neurological complications (OR 4.81, 95% CI 1.13–20.5, P = 0.033); however, it did not independently predict malperfusion syndrome, despite a trend toward significance (OR 8.96, 95% CI 0.90–88.9, P = 0.061).