Fig. 2From: Effect of surgical pleth index-guided remifentanil administration on perioperative outcomes in elderly patients: a prospective randomized controlled trialChanges over time in (a) numerical rating scale (NRS) for pain and (b) modified Aldrete score at post-anesthesia care unit (PACU) in the conventional group or the SPI group. The graph shows a mean and standard deviation of (a) NRS for pain and (b) modified Aldrete score for each time pointBack to article page