Figure 1. Plot of propofol infusion rates (mean +/- 95% confidence interval, in micro gram [center dot] kg sup -1 [center dot] min sup -1) at various milestones during surgery. Dotted lines, standard Practice (SP) group; solid lines, BIS group. The endpoints are abbreviated in Figure 1, Figure 2, Figure 3, Figure 4as: B, a preinduction baseline; Ind, the time of induction; I, the start of the procedure; P, the time of propofol off; and OE, the time of open eyes. The numbers accompanying these abbreviations refer to min before or after the respective endpoint.