Figure 3.

Change of numeric rating scale (NRS) scores (A) and modified Aldrete scores (B) at postanesthesia care unit (PACU) in each group. The graphs show mean values ± standard deviation of each variable for every time points. For each score, there were no significant differences between the groups. SPI group: the surgical pleth index-guided analgesia group, control group: the conventional analgesia group. NRS = numeric rating scale, PACU = postanesthesia care unit, SPI = surgical pleth index.