Fig. (4) (A) Association between relative change (%) in bispectral index (BIS) and relative change (%) in mean arterial pressure (MAP) at 30 seconds post induction with propofol, r =0.60 (p<0.001) (B) Association between relative change (%) in bispectral index (BIS) and relative change (%) in mean arterial pressure (MAP) at 60 seconds post induction with propofol, r= 0.61 (p<0.001).