Fig. 5From: Effects of a single subanesthetic dose of esketamine on postoperative subthreshold depressive symptoms in patients undergoing unilateral modified radical mastectomy: a randomised, controlled, double-blind trialChanges in preoperative and postoperative VAS scores for pain of two groups. The graph shows the mean and standard error of the perioperative VAS scores of Group E and C. Group C, control group. Group E, esketamine group. VAS, visual analogue scale. POD, postoperative dayBack to article page