Secondary outcomes
SD
In both groups, no statistically significant difference was found in the surgery type or location. There was a total of 5 patients with BS, with an incidence of 8% and a median BS duration of 5.3s in the rEEG-guided group, while the routine care group had 12 patients with BS. There was no statistically significant difference in the incidence of BS between the two groups (P > 0.05), while the duration of BS in the routine care group was longer than that in the rEEG-guided group (P < 0.05). The median duration of anesthesia was 155.0 (IQR 120.5–213.0) in the rEEG-guided group and 160.0 (128.5–190.5) in the routine care group, meaning no significant difference. Moreover, there were no significantly different doses of propofol, opioids and neuromuscular blocking agents in both groups. During the maintenance of anesthesia, MAP was 90 mmHg within the rEEG-guided group and 91 mmHg within the routine care group, therefore showing no significant difference, and there was no statistically significant difference between basal and intraoperative MAP at any time point in either group. Furthermore, no inversely significant difference was observed in the time taken in PACU between the two groups (Table 
Perioperative Care MeasuresValues are presented as number (%), mean ± SD or median (1Q, 3Q). MAP: mean arterial pressure; BS: burst suppression; PACU: post-anesthesia care unit